LED lighting Horizontal banding and how to get rid of it.

[drotar]

I shot a exquisitie dance performance last night and shot it using my Sony AS7iii using a very high iso and no flash. Looking at the photos today in Lightroom and i see all the horizontal banding in each of the shots. Wondering if anyone can suggest how i can get rid of the banding. I have 40 photos to do so if there is a quick solution....please, let's hear it. Sample photo attached. they all look like this....

[kglad]

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

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[drotar]

thank you kglad, appreciated.

[kglad]

you're welcome 

[Jao vdL]

This might be caused by the combination of high frequency LED lighting and electronic shutters. This can also happen with fluorescent lighting but looking at the main light sources it is more likely that these are LED lights. Might not be fixable therefore after the fact. Some cameras have special synced shutter modes to combat this issue. You basically make sure you catch more than one cycle of the 'flickering' (it's too fast to notice with your eyes but not fast enough to not be noticed by the camera) of the lights. This can also be combated by using long enugh shutter speeds and by using real curtain shutters instead of electronic ones.

[drotar]

thank you for your input, Jao. now i need to figure out how to fix it in post. arrgggggggghhhhhhh.

[Jao vdL]

Won't be easy! Are the bands present before you denoise? There was a report of a bug causing banding in AI denoise with some cameras but I don't think it was this Sony and it looked different. Also you can actually see that the bluer light on the left in the image with the lady standing on the table is operating at a higher frequency than the more yellow light source on the right. This is pretty typical of these types of lights (they all have their own frequency). Only way to combat is much slower shutter speed that is also just out of sync with the frequency of the lights. The old kind of stage lights were much better for this kind of shot but they were much hotter for the performers to work under. LED light sources are much more bright and efficient (and therefore less hot) but they typically are driven with a fast on-off duty cycle. Here is the top link I found explaining this effect: https://www.youtube.com/watch?v=O7oVXx8VoqA and what to do.