Many thanks. John
---------- Original Message ----------- From: Frantisek <[EMAIL PROTECTED]> To: John Whittingham <[email protected]> Sent: Mon, 7 Mar 2005 16:51:03 +0100 Subject: Re: M 4/200mm vs F 4-5.6/70-210mm at 200mm > JW> Thanks for the info, I can't see me using an f/1.4 though - > little JW> expensive :) Any idea of the magnification using the > full lens? > > IIRC the formula is > > M = 250 / f > > where M is magnification and f is focal length. Thus a 50mm lens > would be a 5x loupe. > > Good light! > fra ------- End of Original Message -------
