No, there were two different S-M-C Takumar (both screwmount) 135 2.5 lenses. The first is 80mm long, the second is 85mm long (measured from front edge of barrel to flange with focus set at infinity). I know of no way to tell just by a serial number alone.
The second version is an improved 6 element design while the first is the same very old 5 element design as the super-Takumar. The second version is the one to get. It's about the same as or slightly rarer as the first version. Last one I sold went for $125 on ebay about 6 months ago to a buyer who knew the difference. BTW, the 135 2.5 "Takumar" bayonet mount lens (non-smc) is a total piece of crap budget series lens not worth buying at any price...... JCO > -----Original Message----- > From: Keith Whaley [mailto:[EMAIL PROTECTED]] > Sent: Friday, September 20, 2002 11:08 PM > To: [EMAIL PROTECTED] > Subject: Re: SMCT 135/2.5 > > > I'm just making a semi-educated guess, but I think you're speaking of > the Takumar, and it has come in both M-42 screw mount and K-mount bayonet? > That's all I can think of. > If so, their performance whould be essentially identical to each > other, as most bayonet SMCs are 'merely' M-42s with bayonet mounts. So > I'm given to understand... > > Frankie Lee wrote: > > > > There are two versions of SMCT 135/2.5. Do they have the same > optical performance? Thanks. > > I have no info on serial numbers, and don't know where to get any! :^( > However, as a single point of reference, I have a 135mm, f/2.5 SMC > Takumar, M-42 mount, s/n 4,961,35x, the "x" being the obfuscating > numeric character... ;^) > > keith whaley >
