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Nikon DSLR Cameras
D850
Nikon D850 Noise
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<blockquote data-quote="pforsell" data-source="post: 668586" data-attributes="member: 7240"><p>I'm sure the following "recipe" is obvious to you, but I post it anyway as someone else might find it useful.</p><p></p><p>I don't know which raw developer you are using, but to have a level playing field please re-verify the camera settings in both cameras. Make sure that at least Active D-Lighting is off, and in-camera noise reduction is off, and vignetting correction is off. All of these affect image lightness and some affect the exposure itself. Some raw developers react to these metadata tags differently. Also set the same manual white balance.</p><p></p><p>Exposure (= f-number and shutter speed) determine the amount of light entering the camera. When testing for noise, you must do it using the same exposure, since the biggest source of noise is the light itself, aka photon shot noise. Set both cameras manually to for example 1/250 sec and f/8 and shoot the test pictures. Your samples show at least one, maybe two stop difference in the image lightness, which may be caused by very different exposures. Lower exposure = less light = more noise. ISO setting does not cause or create noise, usually just the opposite. It is the lack of light that is the main contributor to image noise.</p><p></p><p>For colors from raw, please remember that what you are seeing is the colors produced by your raw developer software camera profile. If the profile is not to your liking, you can tweak it until you're satisfied. There is no such thing as "raw color" until the raw file has been demosaicked, white balanced, gamma corrected and profiled. Make sure you use appropriate settings for all of the stages and do not - I repeat - do not rely on the raw developer software's default settings done by some random programmer who has no idea what you like to shoot and how you like your colors.</p><p></p><p>One last thing for a fair comparison is to compare the final images at the same size. Preferably a print. Print both samples for example on 16x24 inch glossy paper, and compare the end result. Or if you want to save some ink and paper, resample both images to the same size on screen, either upsampling the smaller to the same size as the bigger image, or downsampling the bigger to the same size as the smaller image, or the best scenario is to resample both to the same common size, for example 9000x6000 pixels (54 Mpix) and compare those.</p></blockquote><p></p>
[QUOTE="pforsell, post: 668586, member: 7240"] I'm sure the following "recipe" is obvious to you, but I post it anyway as someone else might find it useful. I don't know which raw developer you are using, but to have a level playing field please re-verify the camera settings in both cameras. Make sure that at least Active D-Lighting is off, and in-camera noise reduction is off, and vignetting correction is off. All of these affect image lightness and some affect the exposure itself. Some raw developers react to these metadata tags differently. Also set the same manual white balance. Exposure (= f-number and shutter speed) determine the amount of light entering the camera. When testing for noise, you must do it using the same exposure, since the biggest source of noise is the light itself, aka photon shot noise. Set both cameras manually to for example 1/250 sec and f/8 and shoot the test pictures. Your samples show at least one, maybe two stop difference in the image lightness, which may be caused by very different exposures. Lower exposure = less light = more noise. ISO setting does not cause or create noise, usually just the opposite. It is the lack of light that is the main contributor to image noise. For colors from raw, please remember that what you are seeing is the colors produced by your raw developer software camera profile. If the profile is not to your liking, you can tweak it until you're satisfied. There is no such thing as "raw color" until the raw file has been demosaicked, white balanced, gamma corrected and profiled. Make sure you use appropriate settings for all of the stages and do not - I repeat - do not rely on the raw developer software's default settings done by some random programmer who has no idea what you like to shoot and how you like your colors. One last thing for a fair comparison is to compare the final images at the same size. Preferably a print. Print both samples for example on 16x24 inch glossy paper, and compare the end result. Or if you want to save some ink and paper, resample both images to the same size on screen, either upsampling the smaller to the same size as the bigger image, or downsampling the bigger to the same size as the smaller image, or the best scenario is to resample both to the same common size, for example 9000x6000 pixels (54 Mpix) and compare those. [/QUOTE]
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Nikon D850 Noise
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