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Author Topic: 1ds2 banding problems  (Read 1923 times)

Ben Rubinstein

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1ds2 banding problems
« on: July 12, 2005, 12:34:01 PM »

I read a report on photo.net of someone who seemed to have the same problem with a 1D mkII to the extent that an entire wedding shot was ruined. The techs seemed to diagnose it as a chip problem that needed to be sent for replacement.

Jonathan Wienke

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1ds2 banding problems
« Reply #1 on: July 15, 2005, 01:56:23 PM »

It's caused by the multiple readout amplifiers in the sensor not being properly calibrated together, so that every eighth row of pixels has a different overall exposure level than the rest. I see a bit of this effect in underexposed ISO 1600 images on my 1D-MkII occasionally, but Neat Image seems to get rid of most of it. If the sample was pushed more than a stop, I'd say the easiest fix is to learn how to expose properly. But if that is a RAW conversion with exposure set at 0, then you'll need to have the camera sent in for sensor recalibration or replacement.

johndoogan

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1ds2 banding problems
« Reply #2 on: July 11, 2005, 01:53:23 PM »

Has anyone else had this banding problem with the 1ds2?
 It shows up as very fine lines close together, sometimes vertical, sometimes horozontal. I suspect it is with polarised images but need to test this.
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matt4626

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1ds2 banding problems
« Reply #3 on: July 12, 2005, 04:25:55 PM »

Seems to be a chip problem that Canon replaces. If it happens all the time then it's a trip to Canon. I've seen it happen once and not come back but that seemed to be caused by extreme cold temperature and humidity.
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