I feel for you! My budget is in danger too, as I have five M42 Pentaxes, an adaptor to fit my six K-mount Pentaxes, plus an M42 adaptor for my three Olympus Pen F's... Zeiss 2.0/28 and 1.4/35mm would lead to more GAS.Trius said:
The Bessaflex has the same stop-down meter switch on the left side of the mirror housing as Spotmatics, and works the same way. I believe all Pentax's auto-diaphragm screw-mount lenses had a sliding Manual-Auto diaphragm switch. With this switch on the lens, adapted to some other body unable to use the Pentax stop-down pin, you'd use this switch to open the lens for focusing, then stop it down manually like a pre-set type lens for shooting. Kind of a pain, I think, but that's the drill with Pentax's own M42-Kmount adaptor and my Pen adaptor too.
Some other M42 lenses do not have this diaphragm switch, so would have to have the auto-actuation pin somehow kept depressed, and then the lens would be straight manual diaphragm in operation. Not my cup of tea.
The SMC Takumars made for the SP-F and ES with wide-open metering have an extra shorter pin that is depressed when the lens is mounted on a different body or adaptor... This little pin releases the Auto-Manual switch on the lens from its normally locked status. So these lenses too would adapt in the same way as earlier M42 Pentax lenses. The compatible Pentax bodies have a groove in the face of the lens mount that allows mounting the lens without depressing that pin. The arm in the SMCT lens's mount that feeds f/stop info to the camera, and its solid calibration lug, shouldn't affect the host body, but I suppose interference is conceivable.
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morongobill
Member
Frank Granovski said:Would these Zeiss be AI, AIS or non-AI?
Sure hope it's AIS then I'll be able too use it on my D70. Btw, a friend of mine is having a heck of a time selling a 58mm f1.2 NOCT on Ebay
because it's an AI lens
Mazurka
Well-known
morongobill said:a friend of mine is having a heck of a time selling a 58mm f1.2 NOCT on Ebaybecause it's an AI lens
I'd bet it's the reserve price or cosmetics, not the lens mount. If anything, the Ai version is rarer - 5 years of production versus 15. Ai-S offers little more than Ai anyway: http://cameraquest.com/aidaiais.htm
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