Object size appearence at the lateral extreme of an image area

Started Jan 10, 2013 | Questions thread
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sherwoodpete
sherwoodpete Veteran Member • Posts: 7,766
It depends

It depends on the subject.

Let's say you use a wideangle lens and take a shot of a brick wall with the camera aimed straight towards the wall. The bricks at the centre of the frame will be the same size as the bricks at the edges.

But now repeat the experiment, imagine instead of flat rectangular bricks, the wall is made from (or covered with) spherical balls. Now the balls in the centre of the shot will appear as a circular disc on the image, but those at the edges of the shot will appear stretched and distorted into elongated elliptical shapes.

This can be a problem when shooting a group portrait at close range with a wideangle lens, those at the edges, and particularly the corners will appear stretched.

Regards.
Peter

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