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Canon Ef 16-35 f4 Decentered or some other issue?

Started 8 months ago | Discussions thread
OP Hayden N Regular Member • Posts: 137
Re: Canon Ef 16-35 f4 Decentered or some other issue?

CameraCarl wrote:

Exactly where were you focused for the landscape shot? How far away was your target? Were you on a tripod? The corners are probably unsharp because they are out of the depth of field. To test this, find another brick wall that is the same distance from your camera that your focusing point for the landscape shot was. Then repeat your brick wall test and check your results. Another way to check for decentering is to take a photo, then rotate the camera 180 degrees (turn it upside down) and take the same photo. Then check the edges and corners. Franky I don't think there is anything wrong with the lens. It isn't going to be sharp edge to edge and corner to corner at f4 under the conditions you faced in that landscape. You need to stop down even a wide angle lens.

Focus for the landscape photo was on the trees just to the right of buildings which were at least 1km into the distance,was handheld, Even at f4 I would expect the plain of focus to cover everything but the foreground.

Will try the other method you mentioned.

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