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  1. #1

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    Oct 2009
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    Anyone who has a Mamiya RB 150mm SF lens, can you confirm this for me?

    This question concerns my newly acquired Mamiya RB 150mm C Soft Focus lens. This is the lens that comes with 3 disks.

    On this lens, there is a lever to close the aperture to the set value. On all other Mamiya lens, this lever goes to the end and when I let it go, it springs back. On this particular lens, as I move the lever, there is a definite friction point toward the end, and if I go further, it sort of "clicks" and stays there. I am guessing this "hold" feature is implemented to facilitate focusing, as this lens needs to be focused with aperture closed to around f/8. Can someone confirm this is the case? (or your lens does the same thing?)

    Thank you.
    Develop, stop, fix.... wait.... where's my film?

  2. #2

    Join Date
    Jan 2010
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    your "guess" is correct

  3. #3

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    Thank YOU!
    Develop, stop, fix.... wait.... where's my film?

  4. #4

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    Jan 2004
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    That is correct.. the preview locks at the end of it's travel to allow you to focus.
    Anyone can make a Digital print, but only a photographer can make a photograph.

  5. #5

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    Glad I could contribute something. Let me know what you think of the lens. I haven't really experimented much with it as a SF lens.

  6. #6

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    I plan to play around with it soon. My first step is to have my girlfriend model for me, holding a resolution chart and try without the disk, from f/4 to about f/8, then wide open with the disks.

    Thanks both for your help!
    Develop, stop, fix.... wait.... where's my film?



 

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