John the M, A and F share an optical formula. The FA is a different formula, Aspherical lens. I've found it better than the rest also.
Don > -----Original Message----- > From: John Whittingham [mailto:[EMAIL PROTECTED] > Sent: Monday, March 07, 2005 7:54 AM > To: [email protected] > Subject: Re: The Pentax Glass Phenomenon Continues! <snip> > I quite like the FA 28mm f/2.8 despite a little vignetting. > > John >
