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Thread started 15 Feb 2012 (Wednesday) 20:12
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7d colour cast problem

 
jaomul
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Feb 15, 2012 20:12 |  #1

Hi All, these 4 pictures were taken in hi speed burst with all the same settings. WB bracketing off, av mode. There seems to be a shifting colour cast different in each picture. Have you ever seen this or have any idea what is the problem, thanks

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Feb 15, 2012 20:16 |  #2

What was SS? Im gonna say right off the bat that its the light cycle.


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LowriderS10
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Feb 15, 2012 20:18 |  #3

+1...the light is actually "flickering" not on solid, but human eyes can't detect it (but this is why some people get headaches, as far as I know)...anyhoo...you'r​e likely catching different parts of the light cycle...nothing wrong with your camera.


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jaomul
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Feb 15, 2012 20:25 |  #4

Shutter speed was 1/800 on these in flourescent light. I never noticed anything like this in normal daylight, It does something similar in tungsten but it is more noticeable with faster shutter speed. Thank you for the info, hope your right and camera is ok


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Feb 15, 2012 20:27 |  #5

It is the light cycle.


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Feb 15, 2012 20:29 |  #6

If it was taken at high shutter speed under fluorescent light, then yes, you're likely catching the flickering of the light and that's giving you the color cast. The lights flicker almost imperceptibly, but that high a shutter speed could catch the variation in light if you hit it just right.

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Feb 15, 2012 20:31 |  #7

jaomul wrote in post #13905258 (external link)
Shutter speed was 1/800 on these in flourescent light. I never noticed anything like this in normal daylight, It does something similar in tungsten but it is more noticeable with faster shutter speed. Thank you for the info, hope your right and camera is ok

Yeah, 1/800 is too fast a shutter speed, it just catches a small part of the cycle. You need to slow it down so it is open long enough for the light to go through the whole cycle. Try 1/60th, or I'm sure someone will pipe up with suitable shutter speeds for you (US electrics are different to ours, so I can't help there as it may well be different cycle times).




  
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LowriderS10
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Feb 15, 2012 20:31 |  #8

jaomul wrote in post #13905258 (external link)
Shutter speed was 1/800 on these in flourescent light. I never noticed anything like this in normal daylight, It does something similar in tungsten but it is more noticeable with faster shutter speed. Thank you for the info, hope your right and camera is ok

We are and don't worry, it is...the reason we knew so quickly (aside from being geniuses...kidding!) is that this question gets asked fairly regularly haha...don't worry about it, your camera's A-OK.


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jaomul
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Feb 15, 2012 20:39 |  #9

Thanks all again, only used these settings as I was showing it off at work and then noticed all my shots looked different. You learn something new everyday


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7d colour cast problem
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