Re: EOS Lens eyepiece

[Mr. Bill]

I've got one of these for my FD lenses and it works great for lenses 
that have a tripod mount.  I've used it on my 500mm f/8 and on a Vivitar 
Series 1 800mm f/11.

Mr. Bill

Malcolm Stewart wrote:

----- Original Message ----- 
From: "captgww" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, March 31, 2004 5:22 AM
Subject: EOS Lens eyepiece



Is there an eyepiece that fits on an eos lens to make it useful as a
telescope??


Have never seen one for the EF range.
I have such a device for my Minolta MF lenses (MC &MD). It's got a focal length
of 10mm and some sort of prism (perhaps ?) to give an upright image. So a 200mm
tele becomes a 20x telescope etc. Is it useful?  No way, in my opinion.  It's
simply too difficult holding the combo still to get a clear view.  And taking
the 200mm lens example again, assume an aperture of f2.8 we get a clear opening
of 71.4mm. Divide by the magnification, 20x, and we get an exit pupil diam. of
~3.6mm.  Not too bad, but it's difficult to hold adequately still without tripod
support.
Not one of my treasured purchases!
Malcolm
Milton Keynes, UK
www.megalith.freeserve.co.uk/oddimage.htm
http://myweb.tiscali.co.uk/ms1938/
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