NOW you tell me !
J.
On Tue, 15 Feb 2005, Schuyler Grace wrote:
> I checked to make sure this wasn't dated April 1, so to refresh anyone who's
> interested in lens basics: 30 inches is the focal length--the distance at
> which at which the lens must be from the focal plane (film) to focus a
> subject at infinity on the focal plane. The 30-inch lens I mentioned in my
> e-mail before is only a few inches thick from front element to back element,
> but the camera bellows has to rack out to ~30 inches to focus an object at
> "infinity" on the ground glass.
Received on Tue Feb 15 22:04:03 2005
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