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<blockquote data-quote="BF Hammer" data-source="post: 772652" data-attributes="member: 48483"><p>I am just going to assume this contest for unedited photos means they want just a JPG straight from the camera with no alteration in Lightroom or Photoshop. Please correct us if that is not the case.</p><p></p><p>High ISO means more noise. The noise in a photo comes from amplifying the electrical signal of the camera sensor when it is weaker to begin with. The degree of noise at a certain ISO varies widely between different generations of camera bodies and between low-end and high-end gear. My D80 from 2007 gave unacceptable noise above ISO 400. My current D750 gives better photos at ISO 3200 than the D80 did at 400. This all factors in. I only started using auto-ISO settings in the past 3 years due to that D80 experience.</p><p></p><p>At long telephoto range, you want fast shutter speed. You can only go so low for f-stop, thus your auto-mode boosts the ISO beyond acceptable noise for your contest. Fred's advise about adjusting the maximum ISO setting is advisable, I personally have my D750 set at 3200 for maximum auto-ISO. I might guess you need to drop that to 1600 or maybe even 800 if you cannot run a noise-reduction filter in Lightroom. Personally I have shot eagles in flight in Shutter-Priority mode and tried to find the minimum shutter speed before motion blur ruins the photo. ISO 400 often is not enough to get those photos with a fast shutter speed. But try to put an upper limit on the auto-ISO for starters, fall back to a fixed ISO 200 or so and Shutter-Priority mode if more is required. Going full manual while chasing flying birds takes a lot of experience and confidence in your equipment and skill. Much easier to try that for birds sitting still on a branch.</p></blockquote><p></p>
[QUOTE="BF Hammer, post: 772652, member: 48483"] I am just going to assume this contest for unedited photos means they want just a JPG straight from the camera with no alteration in Lightroom or Photoshop. Please correct us if that is not the case. High ISO means more noise. The noise in a photo comes from amplifying the electrical signal of the camera sensor when it is weaker to begin with. The degree of noise at a certain ISO varies widely between different generations of camera bodies and between low-end and high-end gear. My D80 from 2007 gave unacceptable noise above ISO 400. My current D750 gives better photos at ISO 3200 than the D80 did at 400. This all factors in. I only started using auto-ISO settings in the past 3 years due to that D80 experience. At long telephoto range, you want fast shutter speed. You can only go so low for f-stop, thus your auto-mode boosts the ISO beyond acceptable noise for your contest. Fred's advise about adjusting the maximum ISO setting is advisable, I personally have my D750 set at 3200 for maximum auto-ISO. I might guess you need to drop that to 1600 or maybe even 800 if you cannot run a noise-reduction filter in Lightroom. Personally I have shot eagles in flight in Shutter-Priority mode and tried to find the minimum shutter speed before motion blur ruins the photo. ISO 400 often is not enough to get those photos with a fast shutter speed. But try to put an upper limit on the auto-ISO for starters, fall back to a fixed ISO 200 or so and Shutter-Priority mode if more is required. Going full manual while chasing flying birds takes a lot of experience and confidence in your equipment and skill. Much easier to try that for birds sitting still on a branch. [/QUOTE]
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