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12/15/2007 08:17:45 PM · #1 |
I take basketball photos for a small college. I use 1600 ISO and around 250 shutter speed. A photographer at the local shop told me today that if I take my 10 megapixel Nikon D80 and set it to 6 megapixels that I should be able to drop my ISO to around a thousand and still get a fast enough shutter speed for the fast movement. Is this true. Thanks for all the help.
Thanks, Jeremy |
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12/15/2007 08:31:41 PM · #2 |
no, the resolution (megapixels) has nothing to do with the exposure settings
they are completely seperate |
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12/15/2007 08:35:04 PM · #3 |
Thank you that sounded a little weird to me.
Jeremy |
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12/15/2007 08:39:56 PM · #4 |
| Time to find a new camera store :) |
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12/15/2007 09:15:44 PM · #5 |
| It bothers me that he should get such "advice" from a "photographer at the local shop" !! |
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12/16/2007 12:18:17 AM · #6 |
If (big if!) the megapixel reduction were to be obtained by adjusting the focal length of the lens so that the entire image fell on the 6MP in the center of the sensor -- rather than simply resampling-down from the full-sized image -- then you'd have the same photons falling on fewer individual sensor elements, meaning each pixel gets more photons in the same amount of time, meaning the same voltage could be reached with less amplification (i.e. at a lower ISO value).
However, I doubt this is how it's actually done ... :-( |
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12/16/2007 10:08:37 AM · #7 |
Originally posted by GeneralE:
If (big if!) the megapixel reduction were to be obtained by adjusting the focal length of the lens so that the entire image fell on the 6MP in the center of the sensor -- rather than simply resampling-down from the full-sized image -- then you'd have the same photons falling on fewer individual sensor elements, meaning each pixel gets more photons in the same amount of time, meaning the same voltage could be reached with less amplification (i.e. at a lower ISO value).
However, I doubt this is how it's actually done ... :-( |
From a P&S perspective, the Fujifilm F50fd is a 12MP camera, and it has a 6MP (fine quality) mode that achieves much better noise reduction, so I think you're onto something there. I can see how they could do that in a fixed-lens P&S, but I'm pretty sure that couldn't be done in the D80. |
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