Shooting Chroma Keys with RED

[Edgar Gil]

Hi Guys!
I just acquired a RED One and according to few articles that I have read, correct me if I am wrong, the Mysterium chip performs the fullest under daylight (5600 K) situations. Does that mean that if I shoot with Tungsten only, is there a sensitivity loss? So I would have to set my light meter on a lower ISO value?
This leads me to the next question: If I shoot chroma keys in studio with tungsten, should I place full blue gels to the lights to get proper results?
Any help would be greatly appreciated.

edgil

 

[jimhare]

Edgil,

Many people have reported excellent results shooting chromakey under tungsten, but yes, it is better to shoot at 5600k if you can.

The main reason is that the blue channel needs to be pulled up quite a bit in post, plus it's the noisiest channel in the first place.

So shooting bluescreen tungsten is certainly the worst combination.

But as I said, many people say it works great, particularly after build 15 or so.

If you can light for daylight, or gel the lights without losing too much, you will be better off.

Do some tests.

Best of luck.

 

[tj williams]

Just shot an indian drummer with many greens and aqua things in the shot against an existing greenscreen in a studio, crummy wall but outa focus due to sensor size shot with producers second camera also cheap HD whch could not pull decent matt put up RED footage and pulled clean without any garbage mattes necessary. ps all shot with tungsten as they were only light available, wished for HMI whole time

 

[Frank Mirbach]

We shoot green screens recently, with tungsten lights. For the blue channel, I added some CTB gels and it worked perfectly.

 

[BradWright]

Hi Guys!
I just acquired a RED One and according to few articles that I have read, correct me if I am wrong, the Mysterium chip performs the fullest under daylight (5600 K) situations. Does that mean that if I shoot with Tungsten only, is there a sensitivity loss? So I would have to set my light meter on a lower ISO value?
This leads me to the next question: If I shoot chroma keys in studio with tungsten, should I place full blue gels to the lights to get proper results?
Any help would be greatly appreciated.

edgil

If you gel the lights you will reduce the light output, but it is a solution. Getting the exposure correct is critical, because the noise in the sensor will wreck havoc on your mattes if you under expose. If you over-expose, you will lose detail.

Of course, I recommend my own product Veescope Live for shooting chroma keys with the Red. However, if you have don't want to spend the $100, I would highly recommend some form of Vectorscope and Waveform monitor attached to the camera. This will allow you to get the highest amount a saturation and optimal brightness for the screen.

You'll want to use extra fill light on the subject so that it's slightly brighter than you want. In fact, bring enough lights to totally blow out both the backdrop and the subject.

 

[Frank Weeks]

Both sources will work well. 5600 works best on Green screen or anything else IMO.

 

[Dave Gray]

http://www.fxguide.com/fxguidetv.html

End of episode 49 pretty much exactly what you're looking for.
Goes through various set ups such as 3200, 5600, 5600 with tungsten light and an 80b, over exposing the screen by a stop etc etc.

 

[Edgar Gil]

Thanks for generous response. Feeling on safer ground
edgil