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11-17-2013, 10:50 AM   #16
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Mercury vapour lamps are the worst, actually alternating between ugly green and purple over the cycle. If they are wired on different phases you can get green under one lamp and purple under another.
Using a longer exposure solves the problem but not so good for sports.
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11-17-2013, 11:00 AM   #17
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Thanks folks! I'll try some of the suggestions for post-processing and maybe use my Q at the next event (if it's at the same location)! In any case, the K-3 AF was wonderful under this lighting. I would never have been able to get so many in-focus shots with the K-5 and my pokey SDM DA*50-135, and OOF is not something I can "fix in post."
11-17-2013, 01:12 PM   #18
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QuoteOriginally posted by elliott Quote
Most sodium vapor lights also cycle at mains frequency, 60hz or 50hz depending on where you are, so the same rules apply. Usually you can get around this by going with a shutter speed of 1/60 (or 1/50) to capture a full cycle, but this is not ideal with a longer lens. You need to capture full cycles, so 1/60 captures one cycle, 1/30 captures 2 cycles, but 1/45 will capture 1-1/2 cycles and throw the colors out.
+1

Do you have a photo of the light fixtures?
11-17-2013, 02:23 PM   #19
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QuoteOriginally posted by kenyee Quote
Do you have a photo of the light fixtures?
Oddly enough, my son took a very blurry shot of the disco ball that was suspended in the rafters, which shows the problematic lights (the big, purple-rimmed ones - the smaller can lights were only on the stage end). Not fluorescent tubes...



11-17-2013, 03:13 PM   #20
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I wonder... if you shot using Multiple Exposure Mode [Additive] or [Bright], would that mean the combined image would defeat the light cycling? I think that mode works with fast shutter speeds too. Or perhaps even HDR Capture mode might work.

These modes may be a little slower I guess, but the K-3 might be able to handle it.
11-17-2013, 07:29 PM   #21
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QuoteOriginally posted by panoguy Quote
shows the problematic lights (the big, purple-rimmed ones
Yep...sodium vapor.
Try slower shutter speeds. That screws up your sports shots though :-(
11-17-2013, 11:29 PM   #22
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QuoteOriginally posted by panoguy Quote
...although some folks had P&S cameras that did flash...
I am amused by this all the time when I watch stadium sports events with all the flashes going off at rows far away from the action.
They don't realise that the flash doesn't do anything and they don't know how to turn the flash off.
But worse still they don't know by not turning the flash off when it is not needed it eats battery juice.

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