Originally posted by TDN This lens is currently on ebay...I can't find anything about it. Only about the 70-210mm
Thought I'd post it here, if anyone's interested...
Does anyone have a clue if this is a fake or not?
Just to clear up a few mis-conceptions:
It is not a fake. It is a K mount AF lens compatible will all Pentax AF film and digital cameras.
(Pentax never made a screw mount AF lens. There was a special K-mount AF lens that would auto-focus only with the ME-F camera (and the AF mechanism, sensor and batteries were built into the lens itself), but this isn't that lens. That SMC-AF 35-70mm f2.8 lens for the ME-F will work on any K-mount camera, but it will only AF on an ME-F body.)
This lens was sold by Pentax under the names Pentax-F and Takumar-F. It was made in Japan by Asahi Optical/Pentax. It is a completely different optical formula from the Pentax SMC-F 70-210mm f4-5.6 lens. It does not have SMC but the optics are coated. It is also a little longer than the SMC-F 70-210mm and the build quality is similar, but the aperture ring feels slightly more flimsy. It was sold as a bargain alternative to the more expensive SMC-F. There was at least one other Pentax-F/Takumar-F zoom lens (a 28-70mm I believe) as well as a few Takumar-A K mount economy lenses. Some of the Takumar-A lenses are truly dreadful, like the 135mm f2.5. Of all the economy Pentax-F/Takumar lenses, the 70-200mm was probably the best of the bunch.
I own a copy of the Takumar-F version of the lens that I purchased new around 1990 for use with my wife's SF-10 film camera. It is actually a decent performer. Images are sharp and the AF and zoom function smoothly. It appears to have slightly less contrast than the SMC lenses but otherwise it delivers nice images across the zoom range. We took it to Yosemite years ago and my wife produced some wonderful images using this lens (shot on Velvia 50 with a tripod-mounted camera). I haven't noticed any problem with flare, but we use it with a lens hood at all times. I did some test shots with this lens using a *ist DL digital body and the results were good.