Originally posted by drewdlephone Hey gang. Just a quickie: There are various versions of Takumar lenses out there, from just plain old Tak, Super Tak, Super Multi Coated Tak, and SMC Tak. What I wanted to confirm was this: On the Spotmatic F, which uses TTL metering *without* stopping down the lens (unlike just about every other Spottie), do you need to have a lens with an Auto/Manual switch to make the meter work properly, or will the Spot F allow for stop-down metering on an older Takumar lens?
If the Auto/Manual thing is a requirement, I suppose that limits me to Super-Multi-Coated and SMC Takumars, correct?
Curious, because I want to add to my Takumar lineup. Thanks.
The "F" has two (2) meters. One for open aperture metering and the other for stop down metering. The "F" will do open aperture metering on Super Multi Coated and SMC Takumars. This is because they have the open aperture tab on the back of the lens that tells the camera what the aperture to which the lens is set.
Super Takumars are metered by pressing the metering button UP. (I believe that the recommendation by Pentax is that you focus wide open first - bright field focusing). Even if the lens is in the "Auto" position, when you switch the meter on, the lens will be stopped down and the secondary meter will be in play. This is the standard meter type for the original Spotmatic.
Auto Takumars (except for the f1.8 55mm, which really is a Super Takumar), do not have an Auto/Manual switch and can be metered by pushing the metering button up, setting speed/aperture as desired, and then cocking the lens and focusing. Alternatively, you can focus first with the aperture wide open, then turn metering on and adjust parameters. I prefer the former because it preserves the functionality and methods used for Auto-Takumars.
Preset Takumars, (and indeed any other preset lens) are usually focused wide open (known as bright field focusing), then metering is turned on, the aperture and speed set as desired and the photo taken.
[The fine print]There will be those who say the focusing/metering procedure can and should vary from the above. Fine. Start by reading the manuals and then find a method that works for you. My descriptions are more directed at answering your questions... [/The fine print]
The Auto/Manual switch is not required to use on the "F." If you have a lens that does not have one, use the procedure for presets. The only reason I ever use the Auto/Manual switch is Depth of Field Preview. This works great. In part I think Pentax put the Auto/Manual on the Super Takumars and later because it allowed these lenses to be used on the older bodies that did not support the Auto aperture functionality of stopping down when the shutter was released. Since I use only period lenses on my older camera bodies, the need to set manual mode never arises.
Hope this helps.
woof