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Old Nov 2, 2006, 11:08 AM   #1
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I've had a KM7D for about 10 months now and have never been happy with the sharpnessofthe subject of my images regardless of what lenses I use. Many of my shots are made in a studio setting using Alien Bees strobe units with my shutter speed set for 1/160 "flash sync". My menus are set as default and I use the center focus point in all my images. Many times the objects behind my subject are crisper than the subject. Any suggestions.
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Old Nov 2, 2006, 11:14 AM   #2
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countryboy wrote:
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I've had a KM7D for about 10 months now and have never been happy with the sharpnessofthe subject of my images regardless of what lenses I use. Many of my shots are made in a studio setting using Alien Bees strobe units with my shutter speed set for 1/160 "flash sync". My menus are set as default and I use the center focus point in all my images. Many times the objects behind my subject are crisper than the subject. Any suggestions.
It sounds like you need to calibrateyour AF. You are still within the warranty period.

Take a look at this thread, which discusses ways to check to see if your AF is properly calibrated.

http://www.stevesforums.com/forums/v...mp;forum_id=84


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Old Nov 5, 2006, 9:44 AM   #3
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countryboy wrote:
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...and I use the center focus point in all my images. Many times the objects behind my subject are crisper than the subject. Any suggestions.
Make sure that's not the problem (using the Center Focus point and reframing).

Reframing can cause backfocus in some conditions. I try to use the focus point closest to my subject's eyes instead to minimize reframing (especially since if you focus on a subject's body, the eyes and face may be out of focus at closer ranges and wider apertures, even without any reframing).

Here are two different articles on this subject:

http://www.mhohner.de/recompose.php?lang=e

http://www.outbackphoto.com/workshop...y06/essay.html

As already mentioned, check your Autofocus Accuracy, too. I use books on a table staggered at different ranges to the camera for this purpose. See the thread that meanstreak mentioned for details:

http://www.stevesforums.com/forums/view_topic.php?id=107395&forum_id=84



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Old Nov 6, 2006, 9:09 AM   #4
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JimC wrote:
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countryboy wrote:
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...and I use the center focus point in all my images. Many times the objects behind my subject are crisper than the subject. Any suggestions.
Make sure that's not the problem (using the Center Focus point and reframing).

Reframing can cause backfocus in some conditions. I try to use the focus point closest to my subject's eyes instead to minimize reframing (especially since if you focus on a subject's body, the eyes and face may be out of focus at closer ranges and wider apertures, even without any reframing).

Here are two different articles on this subject:

http://www.mhohner.de/recompose.php?lang=e

http://www.outbackphoto.com/workshop...y06/essay.html

As already mentioned, check your Autofocus Accuracy, too. I use books on a table staggered at different ranges to the camera for this purpose. See the thread that meanstreak mentioned for details:

http://www.stevesforums.com/forums/view_topic.php?id=107395&forum_id=84


Interesting reads. I recompose on occasion and I never took into consideration that it would affect the distance by repostioning thecamera. I wonder which is worse... turning the camera slightly or stepping to the side to recompose.
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