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| p.1 #1 · 5Dmk2: Black Dot Phenomenon |
The Black Dot problem with the 5D Mark II had been brought up in the main 5Dmk2 thread. Unfortunately, with over 178 pages... it was barely discussed and eventually drowned by numerous other trivial discussions (memory cards, shutter sounds, availability announcements, etc). I thought the problem warranted more attention than that.
The issue has been discussed in this thread at DP Review. Clusters of black dots mysteriously appear on the right side of blown highlights from small light sources, visible even in normal prints. What's disturbing is that the black dots are not a JPEG artifact, but instead it's recorded in actual RAW data. This problem has been seen in many samples at DP Review, at Photo.net, and even at Vincent Laforet's website.
Why would these black dots only appear on the right side? Why are they even there at all? Does this look like something that could be fixed with a firmware update?
I'm hoping that someone with a technical background could offer some theories on the possible causes of this phenomenon.
Edited on Dec 06, 2008 at 02:49 AM · View previous versions