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GiantTristan

Stamford, US
2688 posts

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"RE: sharpest ~15mm?"

GiantTristan Silver Member Nikonian since 08th Jan 2006
Sun 09-Sep-12 05:10 PM | edited Sun 09-Sep-12 05:13 PM by GiantTristan

>Re. the 14-24 DigLloyd has documented focus-shift, which is a
>lens-design issue, not sure if that was a factor in your case
>(on stopping down focus shifts AWAY from focal point in
>central area of the frame).

Depending on how he uses the 14-24, focus shift might very well be an issue for the OP. The majority of my own captures were either at f/2.8, where there is no focus shift, or at f/8 and smaller, where the DOF is large enough to mitigate any focus shift. Consequently, I never had any problem. If you use f/4 or f/5.6, you should move the focus a little forward to account for focus shift. If your camera has LiveView you can always use this approach with MF at high mag.

Tristan

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A general, generic topic sharpest ~15mm? [View all] , steveZ Silver Member , Fri 07-Sep-12 08:38 PM
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