contax IIa: shutter speed selection

Discussion in 'Rangefinder Forum' started by msbarnes, Jul 23, 2012.

  1. msbarnes

    msbarnes Member

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    I have a quick question.

    Is the shutter speed selection "seamless/continous" like the 120 folders? Or do they click into place like most cameras (e.g. M's)?

    I'm sorry if this is unclear but I'm not sure how to explain this well.

    Michael
     
  2. gdmcclintock

    gdmcclintock Member

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    If I remember correctly, you have to lift the ring and turn it to the desired shutter speed, then release the ring. It is neither continuous nor a clicker!
     
  3. brucemuir

    brucemuir Member

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    The "a" series are a bit smoother than the prewar II & III
    The IIa & IIIa do seem to drop down in place much better than the design for the earlier models.

    With the II & III you have to almost wrestle the dial to the speed you want and it works better if you come from a slower speed to a faster speed.

    web_Z7S2355.JPG
    Contax II with 50 Sonnar and Russian Jupiter 9
     
    Last edited by a moderator: Jul 23, 2012
  4. summicron1

    summicron1 Subscriber

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    no, they are not continuous -- you lift and drop, which means that you are inserting a pin into a hole in a ring that in turn sets how far the ring turns before kicking over whatever lever holds the 2nd curtain back.

    On the M-series leicas this is done with a cam and so speeds are continuous (except on some, such as the CL, which is continuous expect between 30 and 60 because that is where the slow speed train engages), but on the screw mount leicas and on the Contaxs, and on the Exaktas, there is no intermediate speeds.

    When you speak of folding cameras, I think you are thinking of rim-set and dial-set compur shutters, which are totally different but also use cams, but the intermediate speeds would not be precise.

    something to keep in mind with those old shutters on Contax/Leica/whatever -- they were rarely as precise as the markings on the shutter would have you believe -- that 1/1250 top speed on the Contax was mostly marketing hype. On any camera run a test roll to see what sort of results you get with whatever the camera is doing -- if all the shots are underexposed, for example, you know the shutter is running fast.