Goddfrey: Variations in lens performance in the 1-5% range is not visible in the output unless your purpose is to record test targets and evaluate lines per mm captured.
That's true. But we are talking about the difference between absolutly top nodge of 50mm lenses. The differences has to be very small. Still, If I had the choise between an FA and an F, I choose the F. BTW - you are right about out of focus rendering. I find that the Limited lenses are really good in this respekt (comparred to my K 135mm and K 105mm). I found that the out of focus rendering of the old A 1.4/50mm wich I have now sold, to be very pleasant. Don't tell me hat this too is the same lens design...:-) Jens Bladt http://www.jensbladt.dk +45 56 63 77 11 +45 23 43 85 77 Skype: jensbladt248 -----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af Godfrey DiGiorgi Sendt: 28. juni 2006 18:19 Til: Pentax-Discuss Mail List Emne: Re: FA-50/1.4 (used) price On Jun 28, 2006, at 8:22 AM, Jens Bladt wrote: > Identical does not exist. > Even two lenses from the same production series can show small > differences. ... Trying to argue a case on unit variations is silly. Unit variations are obviously embedded in any production of multiple units. My use of the word "identical" is simply an emphatic way of saying that the lenses are as like as a production run of optics can be. Variations in lens performance in the 1-5% range is not visible in the output unless your purpose is to record test targets and evaluate lines per mm captured. The difference between these lenses is the design of the mount. If I printed an equally well exposed and rendered 13x19 inch print from each of them, you would not be able to tell them apart unless the scenes printed were specifically those that exaggerate the different qualities of the f/1.4 vs f/1.7 designs in out of focus rendering. Godfrehy -- 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
