> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Pierre
> Bellavance
> Sent: Sunday, March 11, 2001 12:58 PM
> To: [EMAIL PROTECTED]
> Subject: EOS Magnification with 500D Close-Up Adapter.
>
>
> I'm thinking of getting the 72mm 500D Close-up adapter for my 28-135 and
> 100-400 (with step down ring) lenses, and was wondering what
> magnification
> ratio these lenses will attain with this attachment.
As I understand it, the 500 in 500D means that the maximum focusing distance
(infinity set on the lens) will be 500mm. According to fcalc, a distance of
500mm at a 135mm focal length gives a field of view of approximately 65 X
97mm. Remember, this is at the maximum focusing distance. With a 400mm lens,
it's an amazing 6 X 9mm.
Chuck Skinner
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