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09-29-2012, 12:07 AM   #1
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K5 possible issue, dark banding in photos

I've taken alot of photos at the same football field in the same conditions with my K-x, K2000 and *istD and I have never seen this before.
Dark banding that shows up accross the top, middle or bottom of my photos..

See the photos here: (all taken at high ISO, 6400 and 12800)

Dark at bottom, see the brownish color? It should be green like the rest of the field.


Dark mid to top


Dark more towards middle to bottom


Two taken within a second of each other, one dark at bottom, one dark at top



This one looks normal, colors ok top to bottom


09-29-2012, 12:12 AM   #2
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Well pushing the limits with already underexposure does give some side-effects I think.
09-29-2012, 01:42 AM   #3
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Have you previously used such high shutter speeds under these lighting conditions? EXIF data shows above 1/400s. This could very likely be strobing between the light flicker and the shutter openings.

I think anything above 1/180s means that the shutter is not entirely open at any given time, and in order to synch with a full cycle of a single phase of the light you would need to be below 1/60s, but you might get reasonable results at 1/180s because of the 3 phases of electrical lighting used.
09-29-2012, 01:48 AM   #4
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when i shoot indoor comps of sport climbing, i found to have sometime the same kind of issue. I found that i can be due to the lighting.

depending on the area of the field, the light isn't strictly uniform and thus, give you this kind of artefacts.

reducing the iso, increase the DR and help to compensate it.

09-29-2012, 04:18 AM   #5
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I thought about that but raised the question becuase I had not seen it before with my other cameras. But it makes sense... with my other cameras I can not shoot at this high of an ISO, hence slower shuitter speeds. I will go back and compare shutter speeds with older photos.
09-29-2012, 06:02 AM   #6
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I'll also put my 2c in for the issue being related to the frequency of the lighting in relation to your shutter speed. The camera shutter and lighting are being slightly out of phase.
09-29-2012, 06:24 AM   #7
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I have to agree that the lighting is responsible for this. I've dealt with this myself shooting basketball in an indoor court.

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09-29-2012, 06:34 AM   #8
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Has to be lighting, I have seen it when shooting Nikon and Canon as well.

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