Canon 5D MkII Plagued by 'Black Spots'?
Over-zealous in-camera processing might be causing black dots to appear on images from Canon's new DSLR, the 5D MkII.
Posts on internet forums are reporting that these dots appear at the edges of over-exposed (or "blown") highlights. The dots are tiny, and can really only be noticed if you zoom right in and study the images but, for many people, just knowing they are there is annoying enough.
Over at the DPReview forums, member f_stops has come up with a temporary workaround. It involves turning off pretty much all in-camera image correction (not necessarily a bad thing as this can nearly all be done later with the right computer software):
Just picked up my 5dII, and sure enough, I see black dots out of the box.
At iso 400 and iso 6400, with a 50/1.8 and 85/1.2L II. I took a few dozen shots, and they are easily duplicated. I then turned the settings to "Disable" for highlight tone priority, lighting optimizer and noise reduction.
No black dots.
Click the thumbnail for a full sized image. This appears to be a software glitch, and other forums posters ask the obvious next question: Will Canon fix this with a prompt firmware update? For the answer, we take a look at Exhibit A, the 1Ds mk III.
Canon's flagship DSLR, which costs around $6500, shipped with a rather nasty autofocus bug which leaves the camera unable to produce a sharp image under certain conditions (for instance, "a really hot day.") After a recall and two firmware updates, the problem persists. And remember, this is Canon's top-of-the-line pro body. If it can't be bothered to fix such a big issue on such an important product line, we don't expect a fast remedy for the dreaded Black Dots.
LOOK MA, THEY'RE GONE! (How to Eliminate Black Dots) [DP Review via Slashgear via Photography Bay]
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