Originally posted by Lowell Goudge I thought I wopuld pose this question, because K mount lenses actually did not have any designation, they were simply labelled SMC-Pentax.
Later mounts or series had lables like SMC-M, or SMC-F etc.
There were both Takumar Bayonet and SMC Pentax 135mmF2.5 lenses, the SMC Pentax being far the superior. Actually one of the best 135's ever. I paid $125 3 years ago for my SMC Pentax 135F2.5 which at the time seemed like a lot but in hindsight was a real bargon considering the prices today.
As for being a longish shooter, this lens is an ourdoor portrait lens, and does a great job of it.
I've never shot the Tak, but I can attest to the wonders of the K 135 F2.5. So far I've owned two copies of the lens, the first one got wet and while it never developed fungus, it never was the same after and this last spring I had to replace it. Spent $225 for it and was happy to do so. This after me saying "I'm not sure I will be happy spending $125" (in 2006) "for an all manual lens"
NaCl(wish my "investments" would do as well as my lenses!)H2O