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Photography, Digiscoping & Art
Cameras And Photography
Canon
7d soft focus issue
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<blockquote data-quote="tdodd" data-source="post: 1864248" data-attributes="member: 55450"><p>Richard, AF microadjustment may be advantageous (necessary) if you wish to achieve perfect results when pixel peeping. For ordinary photography, done the old fashioned way, rather than viewing at 100%, the probability is that any small errors in AF calibration will slip beneath the radar. There is an interesting article discussin the engineering tolerances in the design of the AF components and the real world results that might be observed. I think it is good information to be aware of when considering AF accuracy....</p><p> </p><p><a href="http://www.lensrentals.com/news/2008.12.22/this-lens-is-soft-and-other-myths" target="_blank">http://www.lensrentals.com/news/2008.12.22/this-lens-is-soft-and-other-myths</a></p><p> </p><p>It might also be worth a read of this follow up article too....</p><p> </p><p><a href="http://www.lensrentals.com/news/2010.03.06/this-lens-is-soft-and-other-facts" target="_blank">http://www.lensrentals.com/news/2010.03.06/this-lens-is-soft-and-other-facts</a></p><p> </p><p>Once you have that under your belt, here is a procedure which ought to permit you to accurately adjust your AF calibration if indeed it is necessary....</p><p> </p><p><a href="http://www.birdphotographers.net/forums/showthread.php?t=58042" target="_blank">http://www.birdphotographers.net/forums/showthread.php?t=58042</a></p><p> </p><p>An alternative approach is presented in this video, using a somewhat expensive calibration tool. Personally I have used an approach similar to this with my bodies/lenses but fashioning my focus target from a contrasty box and using a steel tape as a DOF/focus indicator.</p><p> </p><p>See the second video on this page - <a href="http://videos.lensalign.com/LensAlign/LensAlign-Video-User-Guide/6830310_fnpyr" target="_blank">http://videos.lensalign.com/LensAlign/LensAlign-Video-User-Guide/6830310_fnpyr</a></p></blockquote><p></p>
[QUOTE="tdodd, post: 1864248, member: 55450"] Richard, AF microadjustment may be advantageous (necessary) if you wish to achieve perfect results when pixel peeping. For ordinary photography, done the old fashioned way, rather than viewing at 100%, the probability is that any small errors in AF calibration will slip beneath the radar. There is an interesting article discussin the engineering tolerances in the design of the AF components and the real world results that might be observed. I think it is good information to be aware of when considering AF accuracy.... [URL]http://www.lensrentals.com/news/2008.12.22/this-lens-is-soft-and-other-myths[/URL] It might also be worth a read of this follow up article too.... [URL]http://www.lensrentals.com/news/2010.03.06/this-lens-is-soft-and-other-facts[/URL] Once you have that under your belt, here is a procedure which ought to permit you to accurately adjust your AF calibration if indeed it is necessary.... [URL]http://www.birdphotographers.net/forums/showthread.php?t=58042[/URL] An alternative approach is presented in this video, using a somewhat expensive calibration tool. Personally I have used an approach similar to this with my bodies/lenses but fashioning my focus target from a contrasty box and using a steel tape as a DOF/focus indicator. See the second video on this page - [URL]http://videos.lensalign.com/LensAlign/LensAlign-Video-User-Guide/6830310_fnpyr[/URL] [/QUOTE]
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Photography, Digiscoping & Art
Cameras And Photography
Canon
7d soft focus issue
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