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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

noise..... what's wrong

I didn't think you had to do a black balance with the RED (since it records RAW)......
 
You need to perform a black shading calibration every time you upgrade the firmware (it's all in the upgrade notes). Did you do one when you upgraded to Build 17?
 
Nope. Just got the camera so it came with build 17. Am I supposed to do a calibration or does it come calibrated from the factory?
 
You can not go wrong with a black calibation, however I saw no signs of black shading problems, just the tungsten/underexposed look as mentioned by others. Expose to the right is the way to go, looking at the histogram of your exterior shot, you could easily have given it another stop and if you expose with a lightmeter; I'd say put it on 200-250 ( AFAIK after 70 days of shooting I dare to say I don't think the camera has a sensitivity of 320), however keep the camera set 320.
 
Kenn Michael said:
If it was less compressed, we wouldn't be able to shoot 120fps with it (pure guess). I really try not to shoot anything in 2K unless I have to go over 60fps. 3K definitely holds up quite a bit better than 2K.
Click to expand...

I don't think 120fps is a reason why 2K should be more compressed. From 4K 16/9 to 2K 2:1 you get a bit more than 4x less data, and from 30 to 120 you get exactly 4, so in theory it shouldn't be a question of data space or write speed. Also I think compression takes time to be processed so more compressed = more time. I realize it is a very general statement, but I have to say I am still not understanding why an image from a crop of the sensor is much noisier than an image from the full.

But by pratice i fully agree with you: "not to shoot anything in 2K unless I have to go over 60fps. 3K definitely holds up quite a bit better than 2K"

if you want to evaluate the noise on the red camera, shoot 4K. And I agree with Gunleik, tungsten is not a real problem, but YES 5000 degree kelvin light will lead to less noise in the blue.
I also put my lightmeter between 200-250 asa, and I mainly look to the "raw view" when shooting.

hope you will be happy with your shooting.

ciaow,
antoine.
 
Do you expose to the right using REDspace or REDlog? There is more room in RED log, but I find myself using curves to correct the footage and I endup with something that looks similar to REDspace. When I record REDspace I do not need to do much post processing, which could increase noise as well.

How about 1000k noon daylight? Should we try using a filter for that kind of situation.

Thanks
Radim
 
Did this ever get solved? I've been playing with vush's footage (the sink and the girl walking across the street) and I can't understand something. In RedAlert if I set everything to default (320 iso, etc.) I see a lot of noise. Why is this? I understand that the shot might be underexposed so when you boost RedAlert to 500 iso noise appears, but shouldn't 320 be noise-free (yet dark) regardless of how it was shot?
 
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