just got 7d, I am really frustrated right now.

Started Aug 27, 2012 | Discussions thread
MOD Dale Buhanan Veteran Member • Posts: 4,277
Re: Probably operator error

It looks like it is fine in the center. It also looks like that crop of the right side is in a different focus plane, which is quite a ways behind where you focused. It is also a property of many ultra wide lenses to have a curved focus plane with the edges moving further forward. So it is hard to tell whether this is "normal or not.

You could test the planarity of the lens better by shooting a flat brick wall that is more uniform and then comparing the center and the edges. And as you know, keeping a flat field crisp and sharp on a WA wide open is just not going to happen.

Stop down to f8 and shoot a flat brick wall and then decide if you are satisfied.

liukaitc wrote:

ok this is wide open. is this normal????
--

kind regards
Dale

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