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why do wide angle lenses have better DOF than short?


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#1 kristian andersen

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Posted 31 December 2006 - 04:16 PM

hi.

as far as i understand, wide angle lenses have better depth of field than "less wide" (do you call them SHORT?) - i'm wondering what the technical reason behind this is?

thanks!
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#2 Stephen Williams

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Posted 31 December 2006 - 04:48 PM

hi.

as far as i understand, wide angle lenses have better depth of field than "less wide" (do you call them SHORT?) - i'm wondering what the technical reason behind this is?

thanks!


Hi,

http://www.vanwalree...optics/dof.html

Stephen
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#3 David Mullen ASC

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Posted 31 December 2006 - 08:49 PM

You also have to separate the notion of a short-focal length from a "wide-angle" lens -- a 25mm lens is pretty wide-angle in 35mm but not in 16mm.

Lenses that create a wide-angle "effect" in any format, despite the particular focal length, give the illusion of greater depth of field because they make the background recede in size and increase in view, so the details back there are smaller and harder to tell that they are not really in focus. But if you moved the camera closer to compensate for putting on a wider-angle lens, in order to maintain the same object size, then your depth of field drops off again.
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#4 Jonathan Bowerbank

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Posted 31 December 2006 - 09:09 PM

"less wide" (do you call them SHORT?)


No, long
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