From: Jim Pendergraft <[EMAIL PROTECTED]>
Subject: Re: EOS lens on camcorder
Mark wrote:
> I believe it produces focal lengths that are 7X longer than if used with
> 35mm gear (I.E. A 100mm lens would become a 700mm lens !!!, Or a 400mm lens
> would become a 2800mm lens !!!!!!!!!! :-) )
I'll contribute the obligatory correction here:
No. It is still a 100 (or 400) mm lens. The focal length doesn't
change. The XL1 (or APS, or digicam...) just crop out an area in
the center of the image you get at 100mm (or 400mm). This may
sound picky, but if you use a 20mm lens on an XL1 and expect to get
the same thing as a 144mm on your EOS, you will be really surprised.
The angle of view is truly divided by 7.2 as you expect, but the
perspective is still that of a 20mm, wide angle distortion and all.
So don't try to get a good portrait shot with a 20mm on your XL1.
At least don't ever show that video to the subject :-)
_____________________
The lens that comes with the XL1 camcorder is 5.5 to 88 mm. So you are saying that
over half of the range of the lens is wide angle with a lot of distortion!
I have read before that the lenses on digital cameras, for example, still exhibit the
large depth of field that is typical in wide angle lenses. But a typical digital
camera has a 3x lens that goes from 7 to 21 mm. (35mm equivalent of about 28 to 84).
So are all pictures taken with those lenses on digital cameras examples of wide angle
distortion.
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