BMCC HORIZONTAL LINES IN FOOTAGE LOW LIGHT SCENES
Posted: Thu Oct 03, 2013 6:48 amDear friends. First, excuse my poor english. But I found that my copy of Bmcc MFT shows horizontal moving lines when shoting in low light situation or if you spot a light and leave surrounding dark areas. This areas reveal the horizontal lines moving like an electrical interference. Also they got print in the footage. So if you lift the gamma you can bring to the eye this pattern making almost imposible to rescue some extra information at the edge of the DR.
I borrowed a Bmcc EF's footage from a friend and I went to the same location and shoot my own the same scene with the same setting: (ASA 800 5600, 23,98fps T0.95) . First, was clear his camera doesn't have the lines. I lift gamma and highs to deveal the problem. Also I pushed to the limit the DR, despiting the natural noise, just to see what's going on. I found that the middle lower part of the frame has a bluish color , and not just those to cameras, also I found the same situation in footage from internet.
This problem is only evident at ASA 800 and 1600. IF you set ASA 400 you are more safe to unreveal the crap.
I'm not pretend to be hard time with the limits of the camera, or make an impossible color grading, but something is wrong with the camera 'cos I never saw this lines behavior in any other. And the real proof is the side by side with the other copy that has a clean shot despite the noise.
Any scene with low ligth situation narrow my creative posiblitities when color grading 'cos any setting that include to lift gamma and highs brings up the lines.
I attached two pics so you can see...
Blackmagic Support hasn't return my emails to this respect.
If someone has an opinion or bring a wise word to this matter, I apreciate it.
Best Regards.
I borrowed a Bmcc EF's footage from a friend and I went to the same location and shoot my own the same scene with the same setting: (ASA 800 5600, 23,98fps T0.95) . First, was clear his camera doesn't have the lines. I lift gamma and highs to deveal the problem. Also I pushed to the limit the DR, despiting the natural noise, just to see what's going on. I found that the middle lower part of the frame has a bluish color , and not just those to cameras, also I found the same situation in footage from internet.
This problem is only evident at ASA 800 and 1600. IF you set ASA 400 you are more safe to unreveal the crap.
I'm not pretend to be hard time with the limits of the camera, or make an impossible color grading, but something is wrong with the camera 'cos I never saw this lines behavior in any other. And the real proof is the side by side with the other copy that has a clean shot despite the noise.
Any scene with low ligth situation narrow my creative posiblitities when color grading 'cos any setting that include to lift gamma and highs brings up the lines.
I attached two pics so you can see...
- PIC BLUE MIDDLE FRAME.jpg (383.66 KiB) Viewed 3856 times
- PIC HORIZONTAL LINES.jpg (110.83 KiB) Viewed 3856 times
Blackmagic Support hasn't return my emails to this respect.
If someone has an opinion or bring a wise word to this matter, I apreciate it.Best Regards.