|
I don't think it's inherent in all CMOS sensors, but it's common. I've seen it on 2/3 of the CMOS sensors I've used.
The IMX178 was the worst for it; I didn't do much NB because of it and stuck mostly to LRGB.
The 183 is similar to the 178 but jacking up the gain seems to get rid of it, which is great because I use higher gain for NB anyway.
I don't think dithering helps with this because it shifts every frame. Also, it doesn't seem to average out very well; even with many frames I'd still see it in low-signal images. Key thing is to swamp it with enough signal. I had no problems with the 178 and my L frames, but background areas on NB subs was something else...
The ASI1600 suffers from no such banding.
|