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Old Jul 14, 2006, 11:48 AM   #1
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The camera supports 200-1600, but I find it only has 4 settings: 200, 400, 800, 1600. Is there any way to get an ISO value other than these on the D50?

Thanks.
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Old Jul 14, 2006, 12:18 PM   #2
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I wish ISO50 in the next firmware release (if any after the release of D80).

I think the limited IS0 choices are part of a marketing strategy rather than a technical issue.

I am not very greedy.
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Old Jul 14, 2006, 2:47 PM   #3
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Webapprentice wrote:
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The camera supports 200-1600, but I find it only has 4 settings: 200, 400, 800, 1600. Is there any way to get an ISO value other than these on the D50?

Thanks.
The user can only select ISO in whole stops...200, 400, 600, 1600. When using the camera in full auto, the camera may select any ISO in 1/3 stops. This is one of the features differing the D50 from the D70.
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Old Jul 14, 2006, 3:19 PM   #4
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You can simulate ISO speeds "in between" available speeds by using Exposure Compensation.

For example, if you shoot at ISO 1600 and deliberately underexpose 1/3 stop, you'd be shooting at the equivalent of approximately ISO 2100 after brightening the image later using software.

It's best to shoot in raw if you want to use this technique, and noise will be higher, just as if you used a higher ISO speed to begin with.



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Old Jul 14, 2006, 9:16 PM   #5
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JimC wrote:
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You can simulate ISO speeds "in between" available speeds by using Exposure Compensation.

For example, if you shoot at ISO 1600 and deliberately underexpose 1/3 stop, you'd be shooting at the equivalent of approximately ISO 2100 after brightening the image later using software.

It's best to shoot in raw if you want to use this technique, and noise will be higher, just as if you used a higher ISO speed to begin with.


Do you mean in full-auto, Av or Tv modes?
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Old Jul 14, 2006, 11:13 PM   #6
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Just my opinion, but I don't really know how useful a 1/3 increment on ISO would be. I'm glad I can set the Aperture and Shutter in 1/3 stops increment while the ISO stays full stop. Less dial turn for me when setting it.

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Old Jul 15, 2006, 8:48 PM   #7
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You can switch on 'Auto ISO' mode. This mode will use ISO values in between the 1-stop jump that manual control has. Auto ISO is available in all creative shooting modes.
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Old Jul 17, 2006, 4:18 PM   #8
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Thanks for the information, all. I saw the Auto ISO, but I didn't understand what it was doing at the time, so I turned it off. But now that you mention it, I do remember the camera making a ISO 640 when Auto ISO was activated.
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