Canon 50mm f/1.4 USM Focus Challenge

Started Nov 11, 2012 | Discussions thread
MirekE
Contributing MemberPosts: 821
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Re: Canon 50mm f/1.4 USM Focus Challenge
In reply to Noogy, Nov 12, 2012

I shoot with a 7D and have achieved accurate focus on nearly every occasion, except when I am using my fastest lens in the bag, ironically, that is the 50mm f/1.4 and there is a possibility I am doing something wrong, hence my question.

The DOF is really thin at f/1.4 and small movement of the model or the photographer can cause misfocus. AI-Servo AF mode might help.

Focus & recompose is another possible explanation, especially if the shift is always in the same direction.

It is my understanding that the actual focusing sensors are bigger than the red rectangles in viewfinder indicate and if a contrasty item is placed near the red border, the camera can focus on it rather than on whatever you placed in the middle of the rectangle.

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