Field curvature + lens distortion in group shots

Started Aug 8, 2012 | Discussions thread
Regular MemberPosts: 178
Re: Field curvature + lens distortion in group shots
In reply to CherryO, Aug 8, 2012

If the focus field is coming closer to the camera in the corners (usually the case with a wide-angle lens), you might try MF, bringing the focus slowly in from the other side of infinity until the in-focus indictor just starts to flash. Also, use f11 rather than f8. The centre won't be quite as sharp because of diffraction, but the corners are likely to be much improved.

The rationale behind this is to thicken the (unfortunately dished) in-focus envelope by stopping down, and at the same time pushing it further away from the camera. With a bit of luck, the in-focus envelope will then cover everybody in the picture.

As for distortion, some of it is inherent in the projection of a three-dimensional, wide-angle scene onto a plane, but the people margins can certainly be made to look less fat with software "correction".

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