Originally posted by ZombieArmy I know this is a pretty "panned" lens due to the lack of SMC, but what I've seen from this lens the rendering is really beautiful. It almost reminds me of the K 135 2.5 in a way (at a fraction of the cost). This will be my first Takumar so I'm excited to feel the "tank like" build quality that everyone raves about. My copy will have a bit of brassing but the glass looks good, and at 40 dollars (with shipping) I can't really complain. What has your experiences been with this lens?
Well, first, the name "Takumar [Bayonet]" is unfortunate. Originally the "Takumar" name was used by Pentax in honor of Takuma Kajiwara, a painter, and the brother of Kumao Kajiwara, who founded Asahi Optical. The name was applied to some of the best lenses in the world for several decades, at least until 1975, when Pentax introduced the K-mount lenses and bodies and started using SMC "Pentax" instead of "SMC Takumar" for its lenses of that era.
As far as I know, the "Takumar" name then went unused for a few years until the early 1980's when Pentax (rather unfortunately, I think) started applying the names of "Takumar [Bayonet]", then "Takumar-A", and then "Takumar-F" to some non-SMC "budget" lenses and TC's. [Quite a downgrade for Takuma Kajiwara, methinks.]
So, while the K-mount "Takumar" lenses are indeed Pentax-branded lenses, they're not really in the same league as were the screwmount "Takumar" jewels. To be specific, they will not show "the 'tank like' build quality that everyone raves about" (sorry). Nonetheless they ~are~ Pentax lenses, so I suppose perhaps "they're no slouches, either", and some probably did provide a fairly high "bang-for-the-buck ratio".
I myself am familiar with only two "Takumar bayonet" lenses, the Takumar [Bayonet] 135/"2.5" (which might have been the first, or at least one of the first, of the several "Takumar bayonet" lenses) and the Takumar-A 2X TC (which I don't think I ever used) (?). My thoughts on the 135 are:
1. It certainly had one of Pentax's most colorful exteriors for that time.
2. The built-in sliding hood was a convenient (and helpful) feature.
3. It flared a bit too easily (not surprisingly), but it did have decent contrast and color if the light didn't overpower it.
4. It was small and light (especially compared to the K 135/2.5).
5. It was a nice match in size and weight for the M bodies of its time.
5. It likely was not an "f/2.5" lens but was actually an f/2.8 lens. [I think it's really rather difficult, on a 135mm lens, to somehow mathemagically "squeeze" an f/2.5 aperture into the space bordered by 52mm filter threads.]
6. I suspect that it may have been an optical twin of the later Takumar Bayonet 135/2.8. (?)
Here's how the "big and little" Pentax K-mount 135/2.5's compare (and that's my silhouette reflected in the Takumar [Bayonet] objective) -
And here's a "family portrait" of a few K-mount 135's -