The late SMCT 135 f2.5 is optically identical to the K series. The K has a baffle at the lens mount. The original f2.5 had 5 elements in 4 groups and would 8 primary reflections when looking through the lens. The later, and best, has 6 elements in 6 groups and would yield 12 reflections.
Bob ----- Original Message ----- From: "Keith Whaley" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, September 21, 2002 1:08 PM 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 >
