Identical does not exist. Even two lenses from the same production series can show small differences. We are talking marginals here - something along the line of 1-2% difference between the measured results. Differencies this small can still exist, even for identiacl optical formulas. Mechanics can be more or less accurate too. Even the politics conserning the final quality control may differ from on month to the other. I know, that the German lens testing lab, run by FotoMagazin, tests more than one sample of the SAME lens, in order to determine a reliable test result. To rule out "monday" versions.
The F 1.4/50mm was in production 1989-1991 The FA 1.50/mm was in production 1991-2004 So, there's up to 15 years between the first F 1.4/50mm and the last FA 1.4/50mm. Regards Jens Bladt http://www.jensbladt.dk -----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af Godfrey DiGiorgi Sendt: 28. juni 2006 16:19 Til: Pentax-Discuss Mail List Emne: Re: FA-50/1.4 (used) price On Jun 28, 2006, at 3:02 AM, Jens Bladt wrote: > The F-version is supposed to be even better - one of the very best > 50mm > ever. I had the F50/1.7 and bought the FA50/1.4. If the F version of the f/ 1.4 is the same as the f/1.7 mount, the FA is a better lens mount in feel and finish to me. We know the optics are identical. Godfrey -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.5/377 - Release Date: 06/27/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.5/377 - Release Date: 06/27/2006 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
