Archived posting to the
Leica Users Group, 2004/09/27
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Subject: [Leica] Re: R 60mm and 50mm depth of field differences?
From: jbilin at axionet.com (Jacques Bilinski)
Date: Mon Sep 27 23:02:48 2004
References: <15500326.1096301177481.JavaMail.email@example.com><004001c4a4ba$4e523820$02004254@desktop><BAY19-DAV17dZ06YO4O000315a7@hotmail.com> <firstname.lastname@example.org>
> A 50mm lens
> at 10 feet and a 100mm lens at 20 feet exhibit the exact same DOF. The
> image size on the film is the same.
Actually the image size of a 50mm lens at 10 feet and a 100mm at 20 feet is
not exactly the same. A 50mm lens at 10 feet shows slightly less than a
100mm lens at 20 feet. If you could double the angle of view by halving the
focal length a 24mm lens would show over 90 degrees, a 12mm lens would show
over 180 degrees, a 6mm over 360 degrees, and a 3mm over 720 degrees. It
would be a cheap way to get a rectilinear panoramic with no swinging lens.
In reply to:
Message from telyt at earthlink.net (Douglas Herr) ([Leica] Great Oxendon Northamptonshire #1)
Message from geebee at geebeephoto.com (GeeBee) ([Leica] Great Oxendon Northamptonshire #1)
Message from leica_korenman at hotmail.com (eric) ([Leica] R 60mm and 50mm depth of field differences?)
Message from jcb at visualimpressions.com (JCB) ([Leica] Re: R 60mm and 50mm depth of field differences?)