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  1. #1
    StoneNYC's Avatar
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    Manually adjusting rangefinder (Mamiya 7 II)

    Question: out of ignorance.


    My Mamiya focus's slightly past infinity. However, so do all my Canon SLR's, the only camera that stops exactly at infinity is my Mamiya RZ67 but it had bellows so I assumed it was just different because of that.

    Should my Mamiya 7 II focus past infinity or is it out of alignment and I didn't even realize? (I haven't noticed any focus problems but I also only have run though 6 rolls and only 2 of those were developed but they were not wide open shots with the exception of 1 but I didn't like it so I didn't look close enough to notice if its out it focus).

    Thanks guys!


    ~Stone

    The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic

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    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  2. #2

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    That is not unusual! I don't know about your camera/lens combination but I am aware that some manufacturers build in a certain amount of extra play which is to minimise the effect of focussing errors in very hot or very cold weather. Is the lens in use got an IR index, it may have something to do with that because IR focussing is not where the rangefinder says it is. You have to manually adjust it back to the IR mark.

  3. #3
    Klainmeister's Avatar
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    All my M7II lenses save the 43mm go beyond infinity slightly. That's because in cold weather they can contract and it will be corrected then (I guess....).

    Now if someone could show me how to adjust the vertical alignment I'd be a happy camper!
    K.S. Klain

  4. #4
    StoneNYC's Avatar
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    Manually adjusting rangefinder (Mamiya 7 II)

    Quote Originally Posted by Klainmeister View Post
    All my M7II lenses save the 43mm go beyond infinity slightly. That's because in cold weather they can contract and it will be corrected then (I guess....).

    Now if someone could show me how to adjust the vertical alignment I'd be a happy camper!
    Well I read this on the rangefinderforum site, but no one is responding to me lol

    "The following procedure assumes that your Mamiya 7 was at one time in good, known focus. This is NOT a re-columniation, though I’ll cover that under another procedure.


    If you’ve ever browsed for Mamiya 7 things on e-B$y you’ve probably noticed folks selling a rangefinder adjustment kit for as much as $50.
    That’s a bit much.

    I went to Lisbon last year and noticed that after I stuck the 150mm lens on the camera, the rangefinder was off in both vertical and the horizontal. It wasn’t much, but it was noticeable and with the 150mm being notoriously difficult to focus wide open, I wanted the camera right.

    I went to the Columbo mall and then to Aki to buy a set of jewelers screwdrivers (6 Euros)…

    Be aware that Mamiya themselves have posted a procedure on their user forum site, but it’s hard to find, and I didn’t, at the time, have the benefit of looking for it, deciding to handle the matter in hand, so to speak. Having read it after the fact, there is a warning I want to include:

    ***WARNING***

    Do NOT turn the vertical adjuster more than ¼ turn in either direction, or damage to the camera may result.

    ***End of warning***

    Be aware too, of course, that these repairs are on you. Neither I nor this site take any responsibility for damage to you or your camera. Basically, if you break your camera in half, you get to keep both halves.


    Here we go:

    Pop the little plastic cap off the back of the camera. It’s soft-ish plastic, so do it gently. Everyone in the world will know that you adjusted the rangefinder anyway, but take some care to pull the plug out in such a way as to minimize any damage or impressions—it’ll fit better later.

    Look inside the hole that the plug covered. You’ll see two screws. Those are the rangefinder adjustment screws. The upper (and more recessed one) is the vertical alignment, the raised one is the horizontal adjustment.

    Making sure that there is no gunk on the rangefinder coupling (either the lens or the camera side!), mount the 80mm and turn it to infinity. Find a spot with a cell tower (common in Europe) or radio/TV antenna a mile away (1 km worked fine for me) in view.

    Look through the viewfinder and see where the images align. This rangefinder has a TOUCH of dependencies between the vertical and horizontal adjustments, but it’s not as bad as some I’ve adjusted. Go for the vertical first.
    Put the right sized screwdriver (use one that really fits the slot!) into the upper and more recessed screw and turn just a bit- 1/16th turn is probably too much. Look through the viewfinder and see how much you’ve done. If too much (likely, of you weren’t too far out of adjustment with which to begin) back it off slightly, or go for a tad more. Adjustments here are slow. Take your time, and get it right. Complete it and make SURE that the adjustment is as close to perfect as you can.

    Working on the horizontal, first double check that the lens is at infinity. The screw to adjust is the raised one. Same thing as the vertical adjustment, do only small motions with the screw and make it perfect. You might at this time have to re-adjust the vertical adjustment if you had to do more than a ½ turn on the horizontal. Get it RIGHT. Once you are done, crank the lens to close focus, then back out to infinity, just to check. I hit the camera against the palm of my hand to jar things, but I understand wanting to forego that step. Check vertical and horizontal again, and re-run the procedure if necessary.

    Once you are done, and it’s PERFECT, try your other lenses and just make sure that none of them are not set for infinity correctly. My 150mm was EXACTLY the same as the 80mm when it came to infinity focus, contrary to what Mamiya has said about the 150mm focusing slightly past infinity.

    The final step, should you choose to do it, is to put a drop of locktite (thread locking compound- THE WEAKEST) on the horizontal (raised screw) adjuster. I didn’t do it, and for the remainder of my trip, my rangefinder was just fine- it never crept out adjustment again.

    It’s an easy fix that took 15 minutes in the field. I saved several dollars from going to someone who’d send me an instruction manual and screwdriver for $50, and it didn’t have to go back to Mamiya. Better yet was my feeling of certainty when using the 150mm lens on the camera.

    Good luck & light!"~jdos2 from rangefinderforum.

    But this makes it seem that the focus point has to be at infinity.

    This also explains verticals

    FYI I have a 150,65, and 43mm


    ~Stone

    The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic

    Sent from my iPhone using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  5. #5

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    I would leave it alone. Focusing past infinity is not a big deal. Alignment might be, but even then, as mentioned above, it's a delicate job for DIY. To really accurately do it, you'd want a ground-glass screen at the focus plane, to confirm focus between the film plane and what the rangefinder says.

  6. #6
    StoneNYC's Avatar
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    Manually adjusting rangefinder (Mamiya 7 II)

    Quote Originally Posted by EdSawyer View Post
    I would leave it alone. Focusing past infinity is not a big deal. Alignment might be, but even then, as mentioned above, it's a delicate job for DIY. To really accurately do it, you'd want a ground-glass screen at the focus plane, to confirm focus between the film plane and what the rangefinder says.
    That's what I was thinking, the way the forum posts sounded, this is a common issue, do they often go out of alignment?


    ~Stone

    The Important Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic

    Sent from my iPad using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  7. #7
    StoneNYC's Avatar
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    Manually adjusting rangefinder (Mamiya 7 II)

    Never mind, I just got this...



    So it has ground glass basically so I can just use that to test it, looks good now so I think I'm fine.


    ~Stone

    The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic

    Sent from my iPhone using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  8. #8
    Peltigera's Avatar
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    I wouldn't want to take advice from anyone who talks about "re-columniation" - they clearly do not know much about what they are doing.

  9. #9
    StoneNYC's Avatar
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    Manually adjusting rangefinder (Mamiya 7 II)

    Quote Originally Posted by Peltigera View Post
    I wouldn't want to take advice from anyone who talks about "re-columniation" - they clearly do not know much about what they are doing.
    Lol, oh the Internet..


    ~Stone

    The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic

    Sent from my iPhone using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller



 

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