The coupling extends beyound the barrel of the lens, rather large, fits over the shutter relase so when you press the shutter release the coupling stops down the lens at the same time. I recall that the 10 used stopped down metering, the 11E use open metering. In most images I saw on E bay I could see which lens had it or not.
Hello to all!
This is my very first post in the APUG forum & I think ALPA is worthfully to start with here....
All ALPAS from 10d to 11Si (if metering is enclosed into cam, there were also models without metering, e.g. 11z) do only meter with lens stopped down:
there is a 3 positon switch in front of the camera:
position to the right: No metering, but release is possible
MIDDLE switch postion: Metering starts, when lens release button is pressed; Blade closes an You have to check, if metering is o.k., further pressing releases camera.
position to the left: camera is blocked, no release possible - but meter works: In this postion You can press meter without danger to release the cam.
Got my ALPA 11Si from a well reuptatet dealer, who described camera as not working: He did'nt find the middle position - haha - my luck!
All in all ALPAs are a bit tricky to use, it took some time for me to understand their philosophy....
There are two main (semi-!)automatic adapters: AUTOBAG for M42 & AUTNIBAG for Nikon lenses; they work same way like original for ALPA manufactured lenses like Kern Switar, Kinoptik, Schneiders and Angenieux lenses. These two adapters are not cheap: AUTOBAG approx $300.-US, AUTNIBAG approx 200.-$ (
more than AUTOBAG

)
And there were some self-made lenses, got myself a converted Tele Tessar for Rolleiflex 200mm:
http://forum.mflenses.com/200mm-zeiss-for-alpa-mount-t63577,highlight,+alpa.html
Very very unfortunately there are no Rolleiflex to Alpa Adapters I know of: My Zeissies would appreciate to be fixed to an ALPA!
The master of manuals himself has lot of information for those, who'd like to learn more:
http://www.butkus.org/chinon/alpa.htm
Don't forget to donate his GREAT work with a lill' fee!
Thomas
apropos money:
There's a wide range of price span:
Kern Makro Switar 1,9/50mm will make 2000.- - 2400.-, earlier 1,8 version some bucks less.
have a look to the depth of sharpness - scale and enjoy:
http://www.youtube.com/watch?v=zTJd76nPBLs
These Schneider lenses like 35 ,50 and 135mm will be in the 350.- - 500 region,
Kinoptik 2/100 & 2,8/150 will be in the face gets red region: 4000.- each...
The tiny Makro Kilar 40mm will be roughly in the 200.- - 400.- class, ther are 3,5 and 2,8, and different min distance, worth to have a look to, but no Semiautomatic aperture version!
- but how many lenese do You, made in Leichtenstein - do You even know Liechtenstein itself?
http://en.wikipedia.org/wiki/Liechtenstein