Any idea what this pixelation is from? Digital Bolex sensor

markyf

Well-known member
Only have it on a few shots... Specifically ones like this when I was shooting from outside into a darkened house. These would be ISO 400 and the lens wide open. They were overexposed and brought them down probably 5-6 stops in post. I don't believe I've seen them in a lot of other shots but I need to check (shot 2.5 hours in the last two weeks). Cheers, Mark
 

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Too large for hot pixels. Looks more like spurious voltage( external electronic noise) corrupting the digitized signal stream. Loose connector? Nearby a high freq noise source?
 
In response... they dance around. Not in one fixed place. Nothing out of the ordinary in terms of shooting. What do you mean by loose connector? Not near any type of radiation. It is clearly the worst in the shots that are overexposed but is present in some others as well. Thanks guys. Weirdly no one has taken an interest in this over at the Digital Bolex forums.
 
In response... they dance around. Not in one fixed place. Nothing out of the ordinary in terms of shooting. What do you mean by loose connector? Not near any type of radiation. It is clearly the worst in the shots that are overexposed but is present in some others as well. Thanks guys. Weirdly no one has taken an interest in this over at the Digital Bolex forums.

You should send a couple of DNG raw frames and a jpeg to info@digitalbolex with a service request subject line and description of the problem.
This is not normal, though extreme over or under exposure can show abnormal noise issues. Pushing or pulling 5-6 stops is extreme. Use the raw view mode to set and check exposure by the highlight clip points. Are you running the latest firmware? (1.2.7).
 
Mystery solved... Lightpost, the transcoding software, is introducing this. I went back and looked at the raw files and they don't have these pixels.
 
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