This is a discussion on Canon 'Nift-Fifty' 1.8 within the Digital photography forums, part of the Photography & Fine art photography category; Originally Posted by crystalb If the next one is the same, I will be taking it to the shooting range! ...
Crystal, I am able to achieve better sharpness with all my Canon and Sigma lenses if I turn off auto focus and just manual focus. I truly believe the AF on my 40D stands for "approximate focus" Give it a try. Take two photos, using a tripod. Auto focus one then switch to manual focus for the second photo. Then compare the two on your computer monitor. I bet the manual focus shot is sharpest. Hope this helps - jimmy ...
Almost forgot, shoot at F8 or so and a fast shutter speed.
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I don't have any trouble with my auto focus on either of my 40D's with my Canon lenses. However, I've never done a manual comparison.
Mad , I am about to switch to the Nikon D700. It would be so nice to rely on auto focus but I cannot! All my lenses manual focus sharper so it must be my camera - jimmy
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Mad, just try the comparison and possibly you may be surprised. One really cannot tell just by looking at the back camera screen. It must be compared on your computer monitor - jimmy
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i felt a lot of frustration with focusing as well... it is one of those things that has many elements to it...
fstop. motion. and calibration.
yup. calibration.
here is a website that you may find useful... or, then again, maybe not
LensAlign® Focus Calibration System
ps... with my nifty50 f1.8, i use manual focus only.
Mad, real photo, me I doubt it. Haha.
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Hi tt, thank you for the link. I have used similar test charts. They showed my AF does not focus on the spot I cover with my focus point! Thanks again for the advice - jimmy.
"She liked me on Monday, but it's Friday now, and she has to wash her hair"
http://jumpinjimmyjava.redbubble.com/
http://www.flickr.com/photos/jimmybrown/
http://lensbabylongings.wordpress.com/
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