When the Spotmatic F is used with an SMC Tak lens that has the linkage
you describe (one or two don't), the meter switches on if it senses
light. Covering the lens with a cap will turn it off. It's designed that
way to provide open aperture metering without the use of a switch like
that on the Spotmatic.
Paul
Conrad Samuels wrote:
>
> Hello all.
>
> I've been a Spotmatic SP user for some time. Recently I bought a black
> Spotmatic
> F in good working order but somewhat brassed from a dealer extremely
> cheaply. The camera is fitted with a 50mm f1.8 Meyer Oreston lens.
>
> I find that everything seems to work fine. But I note something unusual.
> When I screw in a SMS Takumar 55mm f1.8 from an ES-II the small metal block
> on the back of the lens mount engages a cam inside the camera body and
> switches the camera meter on as it settles into place. It seems impossible
> to switch the meter off after that. In other words, the meter stays on all
> the time, even if the stop-down metering switch on the front is in the
> "off" position. I notice the ES-II has a similar arrangement: however I
> obtained mine with a defective metering system and never had it repaired so
> I don't understand the purpose of this arrangement.
>
> Does the meter stay on when this lens is in place? What about battery
> drain? What is the point of designing the metering system in this manner?
>
> Anyone have any experience and comments on the Meyer Oreston lens? I have
> not as yet seen results from the camera. I do have two Pentacon 50mm f1.8
> lenses which appear to be quite good (for my purposes anyhow).
>
> Conrad F. Samuels
> Kirstenhof RSA
>
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