Saturday, May 24, 2014

20 Reasons To Consider A C100 Instead Of A DSLR

Earlier this week I borrowed the Canon C100 from the shop for an evening shoot.  I've been wanting to try this camera for a while, but every other time I've attempted to take it the camera has been rented out...until now. 

I'll admit it.  I have a new love in my life and it's the C100.  When the camera first came out everyone was poo-poo-ing it.  "It's only 8-bit.  It only has AVCHD.  It doesn't overcrank....whaaaa, whaaaa, whaaaa."  Heck, even I said some of those things.  However, then I used the C100 and found that the camera shoots super sharp images and is much easier to use than most video cameras I've used before.  After about 3 hours with the camera I felt right at home.

Most of us know that the C100 was meant to attack the video DSLR upgrade market.  I started out on a 5D mark II, as did a lot of other people.  It was our gateway drug, so to speak.  The director I shot for on Tuesday started out on a borrowed T2i.  After using this camera on Tuesday night he sent me a follow up email on Friday with a picture of his newly purchased C100!  So I guess the C100 is the gateway drug to a Red Dragon or Alexa or Amira (my personal dream camera).

Since the director and myself are now both converts I thought it would be good to discuss the reasons why you might also want to consider the upgrade from DSLR to a C100.  In no particular order...

1.  Record Time, Card Backup, and Record Roll Over

Most DLSR cameras are limited to either 12 minutes or 29:59 minutes.  This is no good for event video.  Your producer/client probably expects you to roll the whole event.  Video cameras have been able to do this for years with solid state media.  Notice how the C100 has dual card slots?  This means that you can either create a RAID type backup during recording, for the unfortunate times when a card goes bad, or have the camera roll over to the next card when the other one is full.  (sarcastically) Cards NEVER go bad, right?



2.  Improved Rolling Shutter

I set the C100 and 5D mark II on a tripod and panned along my backyard fence.  Notice how the C100 has about half the rolling shutter of the 5D mark II.  Obviously this is going to be better for cases where you need to pan or catch action sports.  If you're doing corporate interviews, then yeah, it's not of any benefit.  Now before you go into the camera snobbery of global shutter remember that the Alexa, Epic, Dragon, and F5 all have rolling shutter.  Have you complained about rolling shutter in any of the Academy Award nominated films last year...didn't think so.



3.  Complete Audio I/O

The most obvious thing I can say here is that the C100 has proper XLR audio inputs with phantom power.  How many people went out and bought Zoom H4H recorders when the 5D mark II came out?  A lot!  Then there was a hassle of syncing the externally recorded audio to the DSLR mic audio and also finding out that the DLSR audio is either 2 or 3 frames off on the 5D, depending on which mark II/III model you own.  People came out with all types of gadgets to try to plumb audio into the 5D mic input jack, only to find that it's limited by the wind filter you can't turn off and it's still noisy.  Then there was the issue of where to jerry-rig the shotgun mic!  I've seen type of ridiculous setups where it was probably cheaper in the end to just buy the C100!

Well...as you can see, the C100 has a shotgun mic mount, proper XLR audio inputs with level controls and phantom power, all built into the removable top handle.  If you don't need sync audio, don't mount the top handle.  Then the camera is just a little bigger than a DSLR body.

Did I mention that the camera has a headphone output?  I can't count the number of time I wished for this on my 5D.  Some of the new generation DLSR cameras have it.  Most don't.



 


4. 12-stops Of Dynamic Range

The C100 has 12 stops of dynamic range in either WDR (wide dynamic range) or C-log modes.  Yes, I'm aware of the claims surrounding the DLSR cameras, but in neutral/faithful picture styles on the Canon DSLRs I could only measure about 8.5 stops.  If I turn on highlight tone priority I can get another stop, but at the cost of increased noise.  I've tried all types of tricks like turning the contrast down to -2 or -4, but that just leads to issues in post due to the heavy compression applied in the camera.  In contrast (pun intended), the C100 has a true 12 stops of dynamic range available.  The range above/below 18% gray changes with ISO/gain.  At 0dB (ISO 640) or +2.5dB (ISO 850) you have 5.3 stops above and 6.7 under.  The highlight range isn't on par with the Alexa, but good enough for the vast majority of situations...much better than most DLSR cameras in reality.

My preference is to use WDR mode most of the time.  The C-log gamma curve can be a bit much to adjust in post given the internal 8-bit 4:2:0 AVCHD compression.  The WDR gamma curve is closer to a look you might want straight out of the camera without adjustment.  Combined with a Atomos Ninja, the C-log might make a bit more sense for projects that have the budget for a DI.  You can even dumb down the C100 to match the Canon DLSR picture style if you want by choosing the "EOS Std" gamma and color matrix.




5.  Excellent Low Light Performance

This is one area where the C100 and the whole Canon C-series really shine.  There are two pictures below.  One is from my 5D mark II, the other from the C100 with WDR gamma.  Both images were captured at ISO 3200, f/2.8, and 1/48th (C100) or 1/50th (5D).  I encourage you to pixel peep the images in full detail by clicking on them.  To give the 5D a fair chance I turned the contrast down to -2 and turned off highlight tone priority.  Notice how the 5D images lacks detail and shadow exposure range?  It's very noisy and this camera hasn't even heated up yet!  The C100 really shines here and I've even limited its low light range by increasing the ISO all the way up to 3200.  There's still plenty of detail in the C100 image and it's not really noisy at all. 

In fact, the ISO range goes all the way up to 20,000 on the C100.  I've heard of documentary folks going to ISO 10,000 in emergency situations where they were on a bus at night and wanted to document the passengers with just street lights coming in side windows.  The footage was noisy, but not unacceptable for their purposes.  If you REALLY want to push things there's an ISO 80,000 mode available, which I've talked about before on this blog.  That sees further into the dark than you and I can!


 


6.  No Moire and Aliasing

As anyone who has used a DLSR to record video in the last 7 years knows, moirĂ© and aliasing due to sensor line skipping is a huge problem.  Fabric, bricks, ocean waves, leaves...everything sets it off.  Mosaic Engineering came out with an add-on anti-aliasing filter to eliminate the problem, but it meant that you had to trust the mirror lock up function on your camera and hope the battery didn't die so the mirror didn't come crashing down on the filter!  Admittedly, things have gotten better with the 5D mark III which doesn't seem to line skip anymore.  However the vast majority of video DLSR cameras still do. 

The first picture below is from the 5D mark II in video mode.  The second picture is from the C100.  Now before you go saying that the C100 image has aliasing patterns I want you to know that it's actually the scaling that the web browser is doing.  Save each image and view them at 50%, then you'll see the difference.  If you examine the difference at 100% you'll see specs of blue and red in the 5D picture from the moirĂ©.  Neither of those issues exist in the C100 in my testing.

With the C100 you don't have to worry as much about the type of fabric your talent shows up wearing or the background behind the talent.  That's a big deal for local commercials and corporate video. 

 


7.  Long Battery Life

My experience with Canon DLSRs has taught me to expect about 80 minutes per LP-E6 battery.  In terms of capturing an event, it can be frustrating to have to stop and change batteries.  I have had to do this multiple times during a multi-hour interview.  As the photo below shows the C100 takes large batteries, .  The experience of owners is that they can get 5 or more hours of record time on a single battery.  If that's not enough, you can move to an external battery brick solution which should last you an entire day of shooting.  If you still need to fill up SD cards and your back isn't killing you then you can plug the camera into a wall, via adapter, and go however long you want.

During shoots with a DSLR I had to check lighting on the camera, turn off the camera, make adjustments, then turn the camera back on to see the results.  If I kept the camera on the entire time the battery would be nearly dead by the time I started shooting.



8.  Built In ND Filters

Anyone who does run and gun or any shooting outdoors comes to rely on neutral density filters.  the C100 has a 2-stop (0.6), 4-stop (1.2), and 6-stop(1.8) ND filters built into the camera.  The DLSR's...nada.  They are designed to click at ultra fast shutter speeds when the scene is too bright.  With the C100 I only have to carry a 0.3ND, a 0.6 ND grad, and a polarizer in my kit and most of those stay in my kit until I have a specific problem to solve.

Yes, you can get a matte box and run external filters, but "good" ND filters, such as the Tiffen Water White ND's, typically run about $350/ea.  That, and when you use ND filters in a matte box there is a reasonable chance that you will get reflections off the lens onto the ND filter.  The more you stack in the box the more chance of reflections corrupting your image.  I've run into this before when filming outdoors.  It's not rare.  Since the C100 filters are built into the sensor cavity there is nothing to reflect off of, so you don't get problems with filter reflections.

Then there's the inevitable question about variable-ND filters, which was my go-to solution with a DSLR.  Vari-ND filters are just two polarizers.  Most of the cheap ones are made out of plate glass, so they shift your white balance into green (seen it).  The expensive ones don't shift into green, but they still act as polarizers - removing specular reflections; which you may not want to do.



9. Articulating Color Accurate LCD Display

Yes, *some* DLSR cameras have articulating LCD display, but most don't.  For instance, the 5D mark III and 1DC don't have articulating LCD displays.  Typically you're not at eye height with the display, so having an articulating display is useful and often a must.  The only thing better would be and articulating EVF, but you have to dig a bit deeper into your pocket for that.  The Sony EVF is around $5k.  The new Zacuto one is estimated around $3k.

The C100 comes with an EVF, but it's terrible at best.  I'm not the first person to announce this on a blog, so I feel pretty comfortable in my opinion.  Unless you absolutely need it in an emergency in an ultra-bright shooting situation I wouldn't count it as being an advantage.

That said, the LCD on the C100 is excellent and good enough to judge focus pulls most of the time.  It's also reasonably color accurate, unlike the DSLR rear LCD's tend to be.


10.  Active Cooling

There's a reason the new generation of video capable DSLR cameras have an over-temperature sensor on them.  Since the DSLR's don't have active cooling I've seen them overheat in 10 minutes.  When Shane Hurlbut, ASC was filming Act of Valor he wrote about exchanging cameras every 10 minutes because the sensor would heat up and the image would suffer with noise.  That's an unlikely scenario with the C100.  It has a fan and cooling system that keeps the sensor a reasonable temperature so you can film all day long with similar noise performance and little chance of over heating.

 


11.  Handheld Ergonomics

This has been a gripe of DSLR users like me since the first time I hit the record button the 5D mark II (which is actually the "SET" button).  Notice how my index finger is positioned on the record button?  My thumb is near the magnification check button and menu joystick control?  This camera wasn't designed for south-paws, but still...the major controls are all within the pistol grip.  The camera is so small that going handheld isn't that big of a deal.  As long as you aren't using a large lens the camera is light enough to carry around for a few hours and use the EVF for framing.  The aforementioned articulating screen makes it easy to hold the camera away from your body and still have complete control.  The side strap also helps stabilize the connection with your hand quite well.  You *can* approximate this with a DSLR body, but don't expect it to be as stable and without an articulating screen you won't be able to see all the shots on the rear LCD.

One major thing to not about the pistol grip is that it swivels.  So if you need to angle the camera up or down for a long period of time you don't have to cock your wrist to do so.  Just change the angle of the grip.

The other controls are on the left side of the body, so there is little chance of changing a setting accidentally, unlike my experience with the top scroll wheel on my 5D.


12.  Full Featured In-Camera Image Control Options

If you press the "CUSTOM PICTURE" button on the left side of the camera be prepared to have a whole new world opened to you.  On a Canon DLSR you get picture style, saturation, contrast, sharpness, tone, and white balance shift.  That's about it. 

On the C100 you can select from multiple gamma curves.  The saturation control not only includes saturation, but also low key saturation which allows you to roll off color with dark environment, like your eyes do.  There are multiple color matrix options as well as custom color matrix paint controls; the same as any professional video camera.  The sharpness options are extensive.  They let you change which tones and which direction you apply sharpening to, as well as how much.  You can custom tweak the gamma curve for your particular scene in real time.  There's also the familiar white balance shift function from the EOS digital cameras...plus a few more items.  The point being that you have extensive control over your image, whereas a DLSR typically doesn't.  The only DSLR-type camera I've seen come close to this is the Panasonic GH4.

When I need to tweak something on my 5D I had to use the Canon Picture Style Editor software, take a picture in raw format, download it, tweak the picture, save the custom picture style, then upload the picture style file to the camera and see how it really does.  Sometimes it worked, sometimes it required a few tries.  With the C100 if you have an image tweak you need to do you can do it in real time on the camera and watch the results on the monitor as you tweak.  That's a huge time saver in most cases if you're picky about capturing the final image in camera, as I am.




 
 
 



13. Dedicated Exposure Control Buttons

I still get confused about which knob controls aperture versus shutter speed on my 5D mark II.  With the C100 you have 3 dedicated exposure control buttons.  They are clearly marked and their function is obvious.  That's a time saver on set when you have a client breathing down you neck about getting that one last shot before the sun goes down.



14.  Full Size HDMI With Full 1080i Output

Anyone who has rigged up a DSLR with an external monitor of any kind will tell you about the nightmares of breaking off mini or micro-HDMI connectors.  They just don't work on set.  The C100 has a full size HDMI connector with 1080i output at all times.  It doesn't switch down to SD while recording like my 5D mark II.  It doesn't output 720p while recording like some DLSR's do.  It outputs full 1080i.  The only issue being that it's 1080 59.94i, not 1080 24p/30p.  Using an external recorder like the Atomos Ninja requires you to wave your hand in front of the lens for 5 seconds while the recorder figures out how to do the 3:2 pull down for capturing 24p, but it otherwise works brilliantly.

I've seen all types of crazy bracing contraptions bolted to the side of DLSR cameras to protect the HDMI port from breaking.  It's a stupid design.  The only thing more durable/better than this is an SDI BNC output connector, but you have to step up to the C300 to get that connector.

The HDMI output is also 4:2:2 8-bit.  So if you use an external recorder it will give you enough detail to green screen just about anything without weird haircuts and clipping edges of clothing.



15.  Ultra-HD Resolution Sensor

I bet you're thinking "yeah, yeah, yeah...it's got an HD sensor.  Big deal."  Well this sensor is designed to be exactly ultra-HD, which means it has 2x the number of required pixels for HD in both the vertical and horizontal axis.  Why is that a big deal?  It means that Canon can scale down the image to HD exactly by a factor of 2.  Anyone who has used Photoshop knows that an exact integer scale-down is much more sharp and scaling artifact free than scaling an image with a non-integer multiplier.  The C100 shows just that.  It's razor sharp in HD without applying sharpening in the image processing pipe.  This translates to more detailed images for you and your client.

The AVCHD codec softens the image a bit, as does any lossy compression.  However when you use this camera with the Atomos Ninja and a good lens, watch out!  You could cut yourself!  It's that sharp.  In green screen tests I was able to correctly key fly away hairs on a person.



16.  Image Analysis Buttons

DSLRs are starting to get *better* in this area, but still don't perform as well as controls on a dedicated video camera.  In the photo below you see magnification (which is also near the right thumb position), peaking, zebras, and real time waveforms.  My 5D mark II offers some of this functionality in the sense that you can do magnification before recording and it now offers a histogram, but that's not quite what I need.  I want magnification while I'm recording so I can pull focus on a person's eyes.  I want a luma waveform that shows IRE so I know where my exposure is.  A simple histogram doesn't really give you that. 

There is the option of the "Magic Lantern" hack for the Canon DLSRs.  My friends describe it as not crashing "that often."  The GH4 offers more of these controls including peaking and zebras, which is more than I can say for my experience with the 1DC!  At any rate, the controls are there and easy to use.  I use them all the time now.  I don't want to dig through menus to enable and disable these assist functions, like I would have to on a DLSR type camera.  It's too slow and awkward. 



17.  Shutter Time and Angle Options

When I first began I didn't know what a shuttle angle was.  Now that I know, I prefer to use that instead of absolute time for shutter speed.  Independent of frame rate, most often I use a default 180-degree shutter angle.  Since the C100 allows me to set the shutter either as time or angle, I prefer angle since that means I don't have to switch shutter settings when going between 24p and 30p.  It just works.

Through a video from Bill Bennett, ASC I found out that most car commercials are shot with a shutter angle of 220 degrees to get the wheels to spin in the right direction.  For fast action sequences I might thin the shutter to 90 or 45 degrees.  For late night shooting I might open the shutter to nearly 360 degrees to get another stop of light.  In Europe they use a 172.8 degree shutter angle to get around 50Hz light flickering.  Speaking as a cinematographer, it's great to have this image option control.  No DLSR that I've seen so far gives me shutter angle control.  It just doesn't make sense on a still photo camera.




18.  Easy Access To White Balance Controls

On my 5D and every other Canon DSLR you have to take a picture of white card in raw, go into the menu, select that raw image as the white reference, then set the custom white balance using that image, then exit the menu.  On the C100, white balance is just a button press away.  If you want to use color temperature, then just press the WB button followed by the dual ramp button and use the joystick to select the color temperature (assuming the white balance is already set to "K").  The white balance function with the C100 takes *much* less time and is *vastly* more convenient.




19. Dual Pixel Hybrid Auto-Focus

The C100 has built in contrast auto-focus.  With the dual-pixel phase detect auto-focus upgrade the camera can more accurately and quickly find correct focus.  What Philip Bloom found is that you want to enable and disable auto-focus most of the time, so he assigned auto-focus enable/disable to one of the programmable function buttons.  That way he could shift focus whenever he saw an opportunity to re-focus correctly. 

It's not a be-all, end-all by far.  The dual pixel AF only works near the center of the frame.  So if your subject moves away from the center there's a chance they will be taken out of focus.  There's also the danger of seeing the lens breathe as it refocuses, as most DLSR lenses do - some severely.

I tried contrast auto-focus on the GH4 and found it to be problematic most of the time.  It always wants to hunt to infinity given any opportunity.  Fast or not, accuracy counts.  That's why I mostly use Zeiss lenses and pull my own focus manually. 

So it's a matter of the correct situation to use this feature.  It definitely has it's place for projects like weddings, live performance capture, or some sports.



20.  Clients Like Expensive Looking Gear

Like it or not, clients look at your gear and judge the value they are receiving.  Even if you're brilliant with a T5i, they will still think that they could have hired the boss's high school aged offspring who has the exact same camera for $100/job.  Clients want to think they are receiving the maximum value from their money, time, and effort.  Bringing in cheap equipment doesn't help your business, even with great lighting and skill.

Every time I bring a fancy looking camera rig with me everyone oooohs and aaaahs.  Their skin could be green on camera because I haven't white balanced and they could be fully lit from overhead because we haven't setup lights yet, but man do they think they're getting value.  Fancy gear increases your credibility and perceived value.  Do they know the difference between a C100 an C500 - not likely.  But they know it's big, looks like a professional video camera, and has lots of bewildering buttons.  In gadget speak...it's AWESOME!


Saturday, May 17, 2014

Hive "Bee" Plasma Light

The final entry in our series on the new Hive plasma lights at the shop is for the "Bee".  The Bee is a 100-degree flood lamp meant for general area illumination or space light applications.  Unlike many tungsten or fluorescent lights you can mount this light vertically without worrying about burning it up.  I know pictures can be a bit deceiving, so think of this light as about the same size as a Litepanels 1x1, but inches thicker.  As with the other Hive lights this fixture has a single bulb, which means single shadows.



Just like an HMI, the Bee uses an external ballast that generally sits on the floor.  The on switch is shown in the photo below.  The procedure to turn on the light is just to flick the switch on and wait about 90 seconds for the light to come up to full brightness.


By controlling the frequency of the ballast Hive was able to slightly modify the color temperature of the light.  You can see a range of 4500K to 14000K (i.e. moonlight).  No more CTB gels for night scenes!  The transitions between color temperatures takes about 1-2 minutes, so don't expect to dial in the color with immediate feedback.  No, the light doesn't go down into the tungsten range (2700K-3200K) but we have already established that these plasma lights are primarily daylight fixtures.  You can add 3/4 or full CTO if you want tungsten balance...or just use a tungsten lamp if you have the power available.  This light only consumes 276W.  Tungsten is going to be a lot less efficient and much more power hungry, but offers a higher CRI.



Our Bee rental kit comes with a set of scrims and barn doors.  These items are compatible with standard Arri 6.5" modifiers.


There is a slight trick to plugging the ballast into the back side of the fixture.  The plug is a twist lock.  So first plug in the silver/blue plug, then twist it until you hear the snap of the locking mechanism.  You'll need to use the button on the top of the plug to release the cable when packing the light back up.

 

Finally, here it is in action at a recent shoot I did.  Exciting...maybe not.  But the light worked great as a general front area fill and ran all day without issue.


As I mentioned before, if you have any questions please call Jeff or Michael at the shop.  We'll be glad to walk you through out new toys. 

Sunday, May 11, 2014

Hive "Wasp" Plasma Light

Last week I introduced you to our new plasma lights and mostly talked about the "Killer" model.  This week I'll introduce you to Hive's PAR called the "Wasp."  Someone I recently communicated with confused an LED array with plasma.  These plasma lights use a single point source bulb, which you may or may not be able to see in the photos below (it's small).  So the light produces correct single edge shadows, as you would expect from a tungsten or HMI fixture.

The Wasp has a ballast mounted onto the yoke, as in the first picture below.  The DC power supply is vertically mounted on the side of the yoke.  So there's no ballast hanging below the light stand.  All electronics, short of the power cord, are contained in the photos you see directly below.  The yoke accepts a standard 5/8" c-stand stud, so mounting it was a breeze for us.  The light turns on with a switch placed mid-way on along the power cord, just as you would expect from a tungsten fixture.

The Wasp takes about 90 seconds to fully illuminate and come up to the correct color temperature, which is fixed at daylight - or about 5600K.  There is no dimming control on this fixture.  If you want to dim you need to use scrims.  Power off and re-strike can happen instantly, unlike an HMI which needs a few minutes after you press the stop button on the ballast.




There is an external XLR type connection from the DC power supply to the ballast.  The unit we have in rental also has DMX control.  Hive has a battery pack adapter to use standard Anton Bauer packs, but we currently don't have that in rental inventory.  The Hive rep told us to expect about a two hour battery life with a typical Anton Bauer battery pack...however he didn't specify what size of pack that equates to.  Still, if you are working remotely any chance of having these lights keep going for two hours on battery is a very good alternative to a gas generator driving your audio person nuts.  Which reminds me, this light is completely silent.  No fan, hums, buzzes, or other audio issues.

The rep also told us that light output equates to about the same as a 400W Joker.  However this light only consumes about 275W.


The front fixture frame accepts standard Arri 6.5" scrims and barn doors.  As you can see in the photo below there is a standard set of ten scrims along with four lenses that come with our rental kit for the Wasp.



 

Below are some behinds the scenes photos I took from my last cooking show shoot with the plasma lights.  I used the Wasp to punch through a window and provide a hair light on the talent, even in mid-day southern California sunshine.  The light was out on the back patio all day in 85 degree heat and operated without issue.  You can see some screen captures of the production footage on my personal blog. 



If you have technical questions about this light I would encourage you to call Michael or Jeff at the shop.  Since the lights are brand new to our business we're still coming up to speed on in depth knowledge, but we'll do our best to help. 

Sunday, May 4, 2014

NEW at Video Gear: Hive plasma lights!

The week before last I was in Seattle for a production when Jeff emailed me and asked if I could come in on Tuesday for a demo of the Hive plasma lights.  Jamie, their sales rep, was going to drive down from Los Angeles for a morning meet and greet.  The plasma lights seemed like a cool concept at NAB 2013 when Martin and I stopped by their booth.

Video Lights.  How exciting could they possibly be?  Well...these lights are a bit different.  Plasma lighting technology was originally developed for DLP televisions, but when televisions went on an anorexic diet there wasn't a need for a new bulb technology anymore.  The smart folks at Hive took this developing technology and applied it to work as video specific lights.  Here is a brief list of advantages.

  • The color temperature is 5600K, matching daylight perfectly.  If you read my previous blog post you would know that HMI's actually run 6100-6300K; blue-r than daylight.  Kino-Flo daylight bulbs are actually 7000K.  Unlike LED's there's no green or magenta shift.  Cameras are optimized for daylight, so this means your image noise will be optimized for any given ISO.
  • These lights are full spectrum, just like tungsten and HMI.  LED's are generally not.
  • The light lacks severe infrared, so you won't fry talent working under these lights.  It reduces make-up touch ups.
  • You can operate on these lights without gloves.  They get warm, but not fry-your-fingerprints-off hot like tungsten and HMI lights.
  • Unlike HMI there's no risk of UV exposure.  You can operate with or without a lens, just like tungsten, LED and fluorescent.
  • The lights are more efficient than HMI (which obviously means much more efficient than tungsten).  The 275W PAR has about the same output as a 400W Joker.
  • The lights take 90 seconds to fully turn on, which is faster than HMI.  Unlike HMI, you can turn the lights off and immediately strike them again.  Anyone who has used HMI's knows the burden of turning those lights on and off along with the risk of blowing a bulb.
  • There's no filament.  The bulb is a tiny glass container with gas that turns into plasma when radio waves are emitted into the gas - no, this won't interfere with your wireless audio - tested it yesterday on a real production.  Bulb life is many years
  • Speaking of audio, there is no hum as you typically have with HMI lights.  The ballast runs at about 450MHz according to Jamie.
  • Since the ballast is so high speed, you can shoot with any high speed frame rate.  Even the Arri HMI ballast runs at 1kHz, making the maximum frame rate 500fps.  These lights are ideal for slow motion with absolutely no flicker.
  • Hive does make a single model that can shift color temperature, however I'll explain that in a follow-on post.
Later that day after the demo I called Martin to talk to him about what he thought of the demo and he said that he had already purchased the lights!  Then there was a follow up email asking me to take them out for their maiden voyage.  So test I did yesterday!  I'm not going to bore you with BTS photos here.  Those will stay on my personal blog.  Instead I want to use this article to talk specifically about the "Killer" light from Hive, which is a 2-light PAR similar to a maxi.  I'll get to the "Wasp" and "Bee" in follow on articles.

As I just mentioned, the "Killer" is a 2-light maxi-like PAR light fixture.  You can gang them in groups of 2 if you want to form a 4-light maxi.  I took the first picture below just seconds after the light was starting to fire up.  Total light up time is around 90 seconds.  If I would have waited the entire time there is no way I could have taken this picture due to massive lens flare!  This light can be used to supplement outdoor sunlight!

 

There is a slight trick to turning on the "Killer".  You have to follow a specific sequence, which isn't difficult, but it's not completely obvious either.
  1. Turn on the in line power switch
  2. Turn on each of the two light fixture switches at either far side of the back panel.  The red LEDs should come on.
  3. Make sure that the DMX control is in the correct mode by pressing the button, as I'm doing in the photo.
There's an instruction booklet included in the case, so if you forget just look in there.




The fixture frame includes a "junior" pin, which I measured as about 1-1/8", so you can't use this fixture with a standard c-stand.  You need a light stand that can handle a junior pin, which means renting a much larger stand.  Not to worry, we have a Matthews one that doesn't take up that much more room than a standard c-stand.  It's show in the photo at the bottom.  I used it in a house yesterday without issue.


Hive designed the light fixture to utilize standard 8-1/2" lenses and scrims.  The light comes with 8 lenses (4 for each side) and 10 scrims, including half scrims.  If you already own these for your Arri or Desisti fixtures, then you're set.



I know I said I wasn't going to bore you with behind the scenes mayhem, so this is as far as I'll push it.  I shot a cooking show with these lights in a residential home yesterday.  After blasting these lights through a sheet of bleached muslin I was able to get an exposure of a 5.6/8 split on the FS-700.  Even without air conditioning we were able to work under the lights for six hours without having to stop for sweat and makeup change.  They just don't output significant amounts of infrared!  I set the camera to daylight white balance and the color balance was dead on!  I've never had that happen with HMI, LED, or Kino-Flo.


The light is living in my garage tonight, but it will be back in the shop at 8:30am tomorrow morning.  Come down and check it out.    Over the next two weeks I'll cover the "Wasp" and "Bee" lights from Hive.

Saturday, March 29, 2014

Tools For Lighting Outdoor Locations

A while back I learned that whenever you're outdoors you typically want to back light the actors.  If you look at just about any western movie produced over the last 50 years you'll see back lighting on the cowboys - sometimes on both ends of the street during a dual!  Watch for it next time "Shanghai Noon" is on TV.  When I attended the ASC talk with Dan Mindel ASC, he said that Tony Scott taught him the difference between art and pornography....back lighting!

Needless to say, anyone who has shot outdoors knows that it can be very difficult to control and shape sunshine throughout the day.  It takes a very powerful and expensive lighting setup to keep up with the sun; which is usually not in the budget.  This month I wanted to highlight two pieces of grip gear that are relatively inexpensive to rent and are commonly used outdoors. to control sun.

First up is the shiny board, which you can see mounted on a stand behind Video Gear's inventory control manager, Nikita.  There are two types of shiny boards available.  The one shown behind her is the stronger of the two, just so I could demonstrate the effect more clearly.  The other shiny board has more diffuse reflection and may work better in many real world cases.  The reflection is sort of similar to a fold out reflector, however this can be locked in place and you don't have to worry about your grip's consistency from shot to shot.  It's also easier to mount the shiny board higher up than most grips can reach.  Even through it's not clearly shown, the board has a parabolic shape across the surface, so it can concentrate the reflection and throw sun rays a large distance.


The effect here is a bit over the top, but the picture is really for demonstration purposes.  I was able to have Nikita face the sun and add back lighting via the shiny board.  You can see the effect on the top of her head and on the right side of her hair.


Here's the same exposure and white balance without the shiny board.  You can clearly see a difference with and without sun highlights on her hair.  The sun had an exposure of f/22.6.  Without the shiny board her back lighting measured f/8.6.  With the shiny board the back lighting measured f/16.6 - a difference of 2 stops at 8 feet board-to-head, not to mention the specular highlights on her golden hair now that the back lighting is less diffuse.  If she was standing further away from the shiny board the effect would have been even more pronounced because the board concentrates the reflection more as you throw it a larger distance.  So user beware...you might give someone a serious sunburn if you have them stand far away. Also, you never want to use the shiny board for front fill without diffusion because it would be like looking directly into the sun!  We cinematographers torture our actors enough!


Now we're going to look at the opposite situation.  What if the actor is already back lit by the sun and you need frontal fill?  This is what Ultra Bounce rags are made for.  The bounce we have in stock is a 6x6 foot rag and I have it mounted on our Matthews 6x6 frame with two stands.


Again, the effect is a bit over the top but I wanted to demonstrate the effect.  You can see the highlights in her hair from the sun, but the front fill from the Ultra Bounce is making a gradient across her face from right to left.


Here is the same exposure and white balance, but without the Ultra Bounce fill.  The passive fill here was still about f/8.6.  With the Ultra Bounce that was boosted to f/16 - a difference of 1.4 stops and she was standing about 5-6 feet from the frame.


So you don't *always* need a generator truck and a series of 24k HMI lights.  I'm not saying this replaces the need for the big guns (gear envy drool implied), but for a lot of situations these tools are perfectly adequate and provide similar control over outdoor lighting with much quicker setup times and lower cost.  What I didn't show today for brevity sake is an overhead diffusion, but I have to leave something for a future entry.

If you have questions, please call the shop.  We're here to help.

Sunday, March 2, 2014

**NEW** Fiilex LED lights At Video Gear



We have a new LED light kit from Fiilex that just arrived in the shop.  Actually we now have both the 3-head and 4-head kits, but only the 3-head kit was available when I was in the shop taking pictures so that's the one I'm going to discuss here.  This kit is small, lightweight, and portable; lending itself to small corporate shoots and field portable documentary setups.

The 3-head kit comes with three P360 90-watt LED fixtures with color temperature variable from 3000K to 5600K.  The manufacturer claims that the light has light quality better than 92 CRI at all color temperatures in it's range thanks to its special multi-LED bulb.  The light level can be lowered down to 10% minimum.  The fixture uses an external brick power supply that can range from 12-28Vdc, which is both good and bad.  Bad in the sense that you have to wrangle an external power brick/set tripping source without a mid-cord power switch...which we all know is inconvenient for tall stands.  Good in the sense that you can, with the correct power adapter, plug in any broadcast battery and have long lasting portable power without any need for a power socket.  Anyone who does documentary or corporate shoots knows that there isn't always time to scout for power sockets, so it's good to have your own power available when you need it.


The rental kit comes with a well stocked number of light modifier accessories including a set of three dome diffusers, three barn doors, and a set of Fresnel lenses.  The diffuser and lens attach via a set of two magnets and simply snap into place - easy and quick.  Note that the diffusers and lenses are normally sold separately, but we want you to be fully stocked when going into the field. 

 


The kit also comes with a single speed ring and a snap on 15-inch soft box for the normal key light softening on corporate interviews.



Below are three pictures showing a typical light pattern of each of the bulb configurations.  First, the bare bulb, followed by the dome diffuser, and finally the Fresnel lens.  I forgot my light meter at home, so I grabbed an approximate 18% Lastolite chart from sales and a dark corner of the office to test the light's power output.  With a standard distance of 10 feet I found that I was getting an approximate exposure of f/2.8, ISO 800, 1/50th.  For those of you who read our previous blog about foot-candles you would be able to calculate in your head that this gives us approximately 12.5 foot-candles.  On the Fiilex web site they claim 15 foot-candles at 3000K and 17 foot-candles at 5600K and 10 feet. 

The second picture shows the dome diffuser.  The diffuser essentially steals one so I ended up at an approximate exposure of f/2.0.  This is approximately 6.3 foot-candles. 

The final picture shows the Fresnel lens.  This lens adds one stop because I was back up to approximately f/4.0, giving us about 25 foot-candles.


 

Last, but not least, here's a picture of the full kit laid out on our shop floor.  Note that the kit comes with lightweight stands and a Pelican-type roller case.  Everything fits into the size of a small carry-on suitcase.


If you're interested in renting or purchasing a kit, please call the shop.  As I mentioned before, we also have the 411 4-head kit available in case you want an additional light.  However, the 4-head kit only comes with two P360 fixtures and two smaller P180 fixtures.

Sunday, February 2, 2014

Mireds and Correcting the Color Temperature of a Light

As I've recently shown in blog posts, sometimes a video light doesn't exactly have the color temperature that the manufacturer suggests it does.  Case in point, the K55 bulbs from Kino-Flo that are actually closer to 7000K than 5500K.

There's a somewhat less well known method for using filters to compensate for the color temperature of a light fixture using 'Mireds' (pronounced "my-reds").  'Mired' is an abbreviation for "micro reciprocal degree".  Cinematography.com has a nicely written posting about it.  There's also a Wikipedia page, of course.

The concept is quite simple.  Let's say you have a tungsten light, which we measured at 3092K in our last blog post, and you want to compensate that light to 5600K daylight.  The Mired shift is calculated as the difference between the reciprocal of each color temperature multiplied by 1,000,000.

So...

Tungsten = 1,000,000/3092 = 323.4

and...

5600K daylight = 1,000,000/5600 = 178.6

thus...

Mired value = 178.6 - 323.4 = -144.8

Not surprisingly, companies that make filter products, such as Lee Filters, provide Mired calculators.  When I entered in an input light of 3100K and an output of 5600K I found  the following results.  So combining a 3/4 CTB with their 1/4 CTB would actually give me close to what I want.  Using a full CTB doesn't get me quite as close.  They also smartly suggest a plus green filter in case I need to use the tungsten lamp in combination with fluorescent lights.


I would have verified this with real world measurements, but SOMEONE (you know who you are!) in the shop returned the UPRTek spectrometer this week!  I'm curious how well this calculation works with discontinuous spectrums light LED and fluorescent.  Obviously it works well for tungsten, HMI, and plasma; all of which have nice continuous spectrums and color rendering.

Let's do another example out of curiosity.  How about we turn those Kino-Flo Diva K55 bulbs to actual 5500K.  The calculator is telling me that the nearest match is 444 - Eighth C.T. Straw or 212 - L.C.T Yellow.  I would likely try the 212 filter first since that biases the light toward 5600K.

 

One thing that Mired calculation does not do for you is compensate for green/magenta shifts on LED and fluorescent lights.  That's the type of thing that can be quickly analyzed and figured out if you have a device like the UPRTek spectrometer and know how to read (x,y) coordinates.  It's not as technical as it sounds.  In fact it's pretty dead-brain simple with that spectrometer...if I still had it.