marco0782
08-03-2007, 09:48 PM
I'm currently shooting a feature with the Brevis35 and a set of M42 primes as follows:
Zeiss 20mm f2.8
Pentacon 29mm f2.8
Zeiss 35mm f2.4
Pentax 50mm f1.4
Pentax 85mm f1.8
Pentax 135mm f2.5
Some of these images are a little softer than they should be. I have since improved my backfocus on the Brevis and I am now shooting with Detail set to 0 instead of -6 as before. I am in disagreement with people on this board who claim that lowering detail reduces noise. It makes sense but I haven't observed it to be true. The easiest way to reduce noise is to know when to use B. Press or Cinelike V gamma instead of Cinelike D which can be very noisy. What I do is zoom in with Focus Assist to look at the noise in noisy areas such as dark areas. Then O can test out the different gamma modes to see which is the cleanest. If there's no difference in noise between B. Press and Cinelike D, for example, I might use Cinelike D. If not I am better off shooting in B. Press and adding a filmlike gamma in post. I wouldn't go as far as saying that you should shoot B. Press all the time because sometimes Cinelike D is just as clean and if you're looking for more subtle contrast it would be the better choice.
In summary:
B. Press - Contrasty and clean but not very film-like
Cinelike D - Medium contrast and filmlike but noisy in dark spots
Cinelike V - Contrasty, clean and filmlike but not as clean as B. Press
I also recommend setting the Chroma Level to a negative value. The more saturated your image, the noisier. A saturated blue wall is going to be noisy no matter which gamma setting you use or how much light you have. The best way to handle this would be to reduce the Chroma Level. Most of the images you see below were shot with a Chroma Level of -3 or below, all the way down to -7.
Also, I set my Master Pedestal between -3 and -8. Crushing the blacks is a good way to reduce noise in dark areas, but keep in mind that once you crush the blacks there's no turning back. Bringing up the gamma in post will reveal nasty artifacts in the crushed zones where some of the information has been lost.
Lastly, if you need a scene to be dark it would be best to accomplish that in post. The day for night still illustrates this. If it had been lit that way it would have been incredibly noisy.
Let me know if you have any questions, I'd be glad to answer them.
http://www.marcocordero.com/jul07/01.jpg
http://www.marcocordero.com/jul07/02.jpg
http://www.marcocordero.com/jul07/03.jpg
http://www.marcocordero.com/jul07/04.jpg
http://www.marcocordero.com/jul07/05.jpg
http://www.marcocordero.com/jul07/06.jpg
http://www.marcocordero.com/jul07/07.jpg
http://www.marcocordero.com/jul07/08.jpg
http://www.marcocordero.com/jul07/09.jpg
Zeiss 20mm f2.8
Pentacon 29mm f2.8
Zeiss 35mm f2.4
Pentax 50mm f1.4
Pentax 85mm f1.8
Pentax 135mm f2.5
Some of these images are a little softer than they should be. I have since improved my backfocus on the Brevis and I am now shooting with Detail set to 0 instead of -6 as before. I am in disagreement with people on this board who claim that lowering detail reduces noise. It makes sense but I haven't observed it to be true. The easiest way to reduce noise is to know when to use B. Press or Cinelike V gamma instead of Cinelike D which can be very noisy. What I do is zoom in with Focus Assist to look at the noise in noisy areas such as dark areas. Then O can test out the different gamma modes to see which is the cleanest. If there's no difference in noise between B. Press and Cinelike D, for example, I might use Cinelike D. If not I am better off shooting in B. Press and adding a filmlike gamma in post. I wouldn't go as far as saying that you should shoot B. Press all the time because sometimes Cinelike D is just as clean and if you're looking for more subtle contrast it would be the better choice.
In summary:
B. Press - Contrasty and clean but not very film-like
Cinelike D - Medium contrast and filmlike but noisy in dark spots
Cinelike V - Contrasty, clean and filmlike but not as clean as B. Press
I also recommend setting the Chroma Level to a negative value. The more saturated your image, the noisier. A saturated blue wall is going to be noisy no matter which gamma setting you use or how much light you have. The best way to handle this would be to reduce the Chroma Level. Most of the images you see below were shot with a Chroma Level of -3 or below, all the way down to -7.
Also, I set my Master Pedestal between -3 and -8. Crushing the blacks is a good way to reduce noise in dark areas, but keep in mind that once you crush the blacks there's no turning back. Bringing up the gamma in post will reveal nasty artifacts in the crushed zones where some of the information has been lost.
Lastly, if you need a scene to be dark it would be best to accomplish that in post. The day for night still illustrates this. If it had been lit that way it would have been incredibly noisy.
Let me know if you have any questions, I'd be glad to answer them.
http://www.marcocordero.com/jul07/01.jpg
http://www.marcocordero.com/jul07/02.jpg
http://www.marcocordero.com/jul07/03.jpg
http://www.marcocordero.com/jul07/04.jpg
http://www.marcocordero.com/jul07/05.jpg
http://www.marcocordero.com/jul07/06.jpg
http://www.marcocordero.com/jul07/07.jpg
http://www.marcocordero.com/jul07/08.jpg
http://www.marcocordero.com/jul07/09.jpg