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120 / 220 film RF's 120 / 220 format rangefinders including Fuji, Koni-Omega, Mamiya Press, Linhof 6x7/6x9 cameras, Mamiya 6/7 among others, but excluding the 120 folders and the Voigtlander 667 cameras that have their own forums.

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Adjusted the RF in GF670.
Old 10-06-2010   #1
akk2
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Adjusted the RF in GF670.

3 SCREWS under the shoes. slot for vertical, Philips for patch focus adjustment and infinity.
you can push down the arm under the slot screw to move the patch down and turn the slot screw CCW and bring it up until it match.

I feel it is easier than RD1s and it is a better built RF.
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Last edited by akk2 : 10-26-2010 at 20:52.
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Old 10-07-2010   #2
Gary E
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You already needed to adjust the RF in your GF670!?
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Old 10-07-2010   #3
Jamie123
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Quote:
Originally Posted by Gary E View Post
You already needed to adjust the RF in your GF670!?
I don't think it really depends on the age of the camera whether or not one has to adjust the RF. If the RF gets knocked out of alignment it needs adjustment. That can happen within the first week of using a camera or after twenty years.

But it's good to know that this is an easy fix. I'm soon selling mine and so far the RF's still spot on but I'll make sure to pass on the info about the adjustment to the next owner.
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Old 10-25-2010   #4
John NYC
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Quote:
Originally Posted by akk2 View Post
3 SCREWS under the shoes. slot for vertical, Philips for close and infinity.
you can push down the arm under the slot screw to move the patch down and turn the slot screw CCW and bring it up until it match.

I feel it is easier than RD1s and it is a better built RF.
Are the close and infinity labelled?
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Old 10-26-2010   #5
akk2
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wait, i am wrong, it should be finder patch focus adjustment and horizontal alignment. Which you will see the effect in viewfinder live time.

For closest focus the base length should be the other screw only can be adjust with top removed.
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Old 12-14-2011   #6
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anyone know how to get the hot shoe off to get to the alignment screws? thanks.
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Old 12-14-2011   #7
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Have a look at this. It's for the R2/3/4 series but it will give you the general idea.
http://www.arransalerno.com/blog/bes...r-calibration/
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Old 12-19-2011   #8
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a thousand thanks. i've got it aligned perfectly now! what a difference.
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Old 12-10-2013   #9
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Awesome, thanks!
The simpler, linear RF mechanism of the GF670 seems to pay off here.

Still - does anyone know a matt screen/ground glass for focus check on the GF670/Bessa III that would work "as-is", for example from other cameras?
I am thinking of making a little kit to take on travels, to check focus and be able to adjust the RF on the go if needed.
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Old 12-10-2013   #10
santela
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I got mine used, and I find it accurate in close distance but obvious shift above 1.5m.

Is it sth I can fix on my own or should I get a pro to do it?
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Old 01-28-2014   #11
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What size of screwdrivers did you use? i want to toss one into my travel pack in case calibration goes off on the road.
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