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<blockquote data-quote="BackdoorArts" data-source="post: 624674" data-attributes="member: 9240">You're listed as a semi-pro so my apologies if this is old knowledge. In my experience with the D7xxx series I found that when the shutter speed was less than 1/(focal length x 2) mirror slap would degrade clarity ever so slightly. This was corrected by shooting in Quiet mode. There are some old threads around here somewhere that demonstrate this. This isn't a &quot;focus issue&quot; it's a sharpness issue, and I'd ask that you take a hard look at your shots and see if that may be what you're seeing. With a focus issue you'll find that the wrong thing is in focus. With a sharpness issue you'll find that nothing is in focus. With the 28MP cropped sensor I quickly found that applying the Inverse Focal Length Rule was not enough to get sharpness when the focal length got into triple digits, it was necessary to go to 1/(focal length x 2), regardless of whether or not you're using VR. And with VR, make sure you get a lock before firing.</blockquote>

[QUOTE="BackdoorArts, post: 624674, member: 9240"] You're listed as a semi-pro so my apologies if this is old knowledge. In my experience with the D7xxx series I found that when the shutter speed was less than 1/(focal length x 2) mirror slap would degrade clarity ever so slightly. This was corrected by shooting in Quiet mode. There are some old threads around here somewhere that demonstrate this. This isn't a "focus issue" it's a sharpness issue, and I'd ask that you take a hard look at your shots and see if that may be what you're seeing. With a focus issue you'll find that the [I]wrong thing is in focus[/I]. With a sharpness issue you'll find that [I]nothing is in focus[/I]. With the 28MP cropped sensor I quickly found that applying the Inverse Focal Length Rule was not enough to get sharpness when the focal length got into triple digits, it was necessary to go to 1/(focal length x 2), regardless of whether or not you're using VR. And with VR, make sure you get a lock before firing. [/QUOTE]

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