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  1. #21
    Colin Corneau's Avatar
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    Thank you for the link, Edwardv -- a question for you or anyone:

    Is there a difference, for my humble little SQ-Ai, between a 120-I, 120, and 120-B back?

  2. #22
    DWThomas's Avatar
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    Not sure I can spell out exact differences, but I believe the I is the only one that interacts with the autoexposure stuff.

    I only have an SQ-A so it hasn't mattered here.

    DaveT

  3. #23

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    I would go with all Ai magazines for my camera. It has the locking dark slide which is very nice to have. The older magazines don't have this feature and can be be very disastrous it you pull accidentally or gets caught on something and the dark side is pulled out. Best to get the Ai and buy additional Ai dark sides with the lock for all Ai magazine. And DWThomas is correct that the AEIII meter is the choice for the Ai magazines.

    Good luck

  4. #24
    Robert Kerwin's Avatar
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    The 120-I has the film speed dial on it and it electronically interfaces with a metered finder (such as the AE). If you only use a waistlevel or other non-metered finder, you don't need the 120-I, but it won't hurt anything if you use it. The plain 120 back has no electronic film speed interface. Other than that, there's no real difference between the two.

    The 120-B I thought was for the SQ-B series, not the SQ-A, but I could be wrong.
    "Photograph more, worry less"

  5. #25
    DWThomas's Avatar
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    Quote Originally Posted by Robert Kerwin View Post
    The 120-B I thought was for the SQ-B series, not the SQ-A, but I could be wrong.
    Again, I don't own one, but I think it fits everything, but like the B body, it has no wires. My understanding is the SQ-B was supposed to have been a stripped down low cost manual exposure student model kit to offset the significant price of the SQ-Ai.

    Sorry about all the weasel-y qualifiers, but it's been a while since I researched the stuff and I only do the SQ-A.

    DaveT

  6. #26
    evilhomer78's Avatar
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    Quote Originally Posted by Colin Corneau View Post
    Is there a difference, for my humble little SQ-Ai, between a 120-I, 120, and 120-B back?
    The differences are:
    120 : has the ISO dial on the top of the back.
    120-I : has the ISO dial on the back of the back, so its easier to see and adjust when the camera has a prism attached, it also has a was of adjusting the exposure +/- in 1/3 stops
    120-B : doesn't have an ISO dial or connectors

    Otherwise they are basically identical, and can be used on any sq series camera.

    I've got an SQ-A and I use both 120 & 120-I backs.

  7. #27
    Colin Corneau's Avatar
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    Great stuff, e-homer!

    My SQ-Ai is totally manual, I don't use the meter or put batteries in it. And those regular backs on KEH were priced pretty nicely.

  8. #28
    evilhomer78's Avatar
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    Quote Originally Posted by Colin Corneau View Post
    Great stuff, e-homer!

    My SQ-Ai is totally manual, I don't use the meter or put batteries in it. And those regular backs on KEH were priced pretty nicely.
    Are you only shooting at 1/500 sec? If you don't have batteries in the camera, it will only fire at 1/500 sec. The shutter speeds are controlled electronically in all Bronica SQ series cameras.

  9. #29
    Colin Corneau's Avatar
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    It is an SQ-Ai, but they must be some long-lived batteries if that's the case. I bought it third-hand, and they've never been changed.

    Shutter speeds are accurate (as the finicky TMax100 rolls attest).

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