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Focus Issue on New Canon 135mm f2 L ?

Started Mar 14, 2016 | Discussions thread
BAK Forum Pro • Posts: 26,020
Yes, you should have added more details

It's hard to answer a beginners question when the fancy camera and fancy lens suggest some knowledge. And then we learn bad practices are being followed.

Focusing and recomposing with a very wide aperture on a telephoto lens guarantees lousy results.

(Be prepared for comments from ignorant amateurs arguing about this.)

TEST: Put your camera on a tripod.

Put a sharp, flat, object in front of the camera.

Focus.

See if the picture turns out OK.

That will tell you if your camera and / or your lens is broken, or if it is operator-error.

Once you learn that that your camera and lens works OK, you can start to figure out what happens when the camera is not rock solid, and the subject is not rock solid.

BAK

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BAK
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