> > Date: Wed, 07 Jul 2004 16:34:20 +0200 > From: =?ISO-8859-1?Q?Michel_Carr=E8re-G=E9e?= <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Subject: Re: takumar lens dates? > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > Content-Transfer-Encoding: 8bit > > [EMAIL PROTECTED] a �crit : > > >Has anyone attempted to work out the correlation between when an M42 > >takumar lens was produced and its serial number? > > > >A > > > Yes, Gerjan von Oosten in "The Ultimate Asahi Pentax Scew Mount Guide"
Unfortunately, no. I've got the book. He has dates of production, and does attempt to correlate dates of CAMERAS with serial numbers, but not dates of LENSES. Even the camera info is sketchy. He's got nothing on serial number ranges of lenses other than the approximate date of the switchover to SMC, probably because the info was not availible. Actually, I have a super-takumar 24/3.5 that has a serial number that SHOULD be SMC by his reckoning, and from what I can tell has neither cam nor coating. I think mfortytwo.info is actually an attempt to prove Gerjan's theory that the lenses were made in batches with consecutive serial numbers. My question is--given a lens with serial number xxxxxxx, when was it made? Given Gerjan's dates of production, and the mfortytwo.info database of serial numbers, it ought to be possible to work out a rough correspondance. I'll do it if it hasn't been done already. DJE
