Fed 2 with Jupiter 12 problems

B

Bridgey

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Hi folks, newbie here. I have a fed 2, green body with jupiter 35mm 50mm and 135mm lenses. All is going good, albeit with a steep learning curve. I used my black bodied 35mm lens for first time last weekend, after developing film, all photos were out of focus. I have not had this problem with the other two lenses. Is the problem pilot error with this lens? I focused on distant object and the lens was not on infinity symbol. Any advice would be bloody fantastic.


Thanks

Mark.
 
Hello Mark, and Welcome.

If the other two lenses do not cause problems, then the camera's rangefinder is likely O.K.

It's the Jupiter-12, I guess; probably, a previous owner did something to it. Where did you buy it? Is there any chance to ask the seller?
 
I have read somewhere that black J12 lenses do not work well with Fed2 bodies. When I had both, I found that to be true. Rangefinder "finger" does not touch cam in the lens. The arm of camera has to be bent up a little to make sure it clears body of a lens and comes in touch with rangefinder cam. You can open shutter on B and inspect it from the back. It will be hard to see due to size of rear element.
 
Crazy Fedya said:
I have read somewhere that black J12 lenses do not work well with Fed2 bodies. When I had both, I found that to be true. Rangefinder "finger" does not touch cam in the lens. The arm of camera has to be bent up a little to make sure it clears body of a lens and comes in touch with rangefinder cam. You can open shutter on B and inspect it from the back. It will be hard to see due to size of rear element.
Click to expand...

Yup, good advice.

I had that very same problem with the Fed 2 and J-12 lens and in my case bending the cam arm down and re-checking infinity alignment and the 1 metre focus point of the RF solved the problem.
 
radi(c)al_cam said:
Could you elaborate that a bit, please?

(I'd say the lens. Bending the rangefinder cam arm wouldn't be my first recommendation.)
Click to expand...

Wouldn't mine either, because I read this:
I focused on distant object and the lens was not on infinity symbol.
Click to expand...
It tells me that lens cam is pushing RF arm properly, but lens focus helicoid assembly went wrong.
My suggestion is still to inspect it at B and back removed, just it case and if everything looks fine, here is two options. Re-position focus ring to match lens focus at infinity, most easy one to do. But it needs to be verified with ground glass to see if RF focusing matches. Most likely it isn't and then lens focusing part need to be reassembled properly. Again with verification on ground glass.
I recently disassembled 1950 J-12 to get rid of old grease and re-shimmed it for M. Focus smoothness now is better comparing to new CV Zeiss lens I have.
 
Ko.Fe. said:
Wouldn't mine either, because I read this:

It tells me that lens cam is pushing RF arm properly, but lens focus helicoid assembly went wrong.
My suggestion is still to inspect it at B and back removed, just it case and if everything looks fine, here is two options. Re-position focus ring to match lens focus at infinity, most easy one to do. But it needs to be verified with ground glass to see if RF focusing matches. Most likely it isn't and then lens focusing part need to be reassembled properly. Again with verification on ground glass.
I recently disassembled 1950 J-12 to get rid of old grease and re-shimmed it for M. Focus smoothness now is better comparing to new CV Zeiss lens I have.
Click to expand...

The problem with the Fed 2 and some J-12 lenses is that the RF cam on the arm in the camera is positioned slightly too high to properly mate with the focus back cam on some of the J-12 lenses and a slight bend of the RF arm will fix this issue.

Doing a re-check of the infinity and proper 1 metre focus ability after is a must after the RF cam arm is slightly bent. In my case very little needed re-calibration.
 
xayraa33 said:
The problem with the Fed 2 and some J-12 lenses is that the RF cam on the arm in the camera is positioned slightly too high to properly mate with the focus back cam on some of the J-12 lenses and a slight bend of the RF arm will fix this issue.

Doing a re-check of the infinity and proper 1 metre focus ability after is a must after the RF cam arm is slightly bent. In my case very little needed re-calibration.
Click to expand...

Yes, I'm fully aware of this problem and I was writing about it on this and very forum and how to fix it.
But, if OP writes " I focused on distant object and the lens was not on infinity symbol" it tells me what RF arm is traveling as it should. You can't focus RF on infinity if RF arm is not traveling freely, isn't it?
 
Ko.Fe. said:
Yes, I'm fully aware of this problem and I was writing about it on this and very problem and how to fix it.
But, if OP writes " I focused on distant object and the lens was not on infinity symbol" it tells me what RF arm is traveling as it should. You can't focus RF on infinity if RF arm is not traveling freely, isn't it?
Click to expand...

The RF cam arm should be checked for free and easy travel first thing off the bat. I do this on my many Fed 5 bodies, as the RF arm on these models tend to stick if the camera is not frequently used.

Remember the OP's original problem is: "I used my black bodied 35mm lens for first time last weekend, after developing film, all photos were out of focus. I have not had this problem with the other two lenses. Is the problem pilot error with this lens? I focused on distant object and the lens was not on infinity symbol. Any advice would be bloody fantastic."

This is exactly what my problem was on my FED 2 when used with my black finish J-12 lens and I repeated to the OP on how I fixed the problem.

As a caveat, as they say, YMMV. ( your mileage may vary)
 
Since "I have not had this problem with the other two lenses", then it looks like the RF cam was being pushed by the rear elements of J12, and the rangefinder patch reached infinity prematurely.

But then we must ask OP if the lens can reach infinity symbol when mounted on the FED-2.
 
xayraa33 said:
The RF cam arm should be checked for free and easy travel first thing off the bat. I do this on my many Fed 5 bodies, as the RF arm on these models tend to stick if the camera is not frequently used.

Remember the OP's original problem is: "I used my black bodied 35mm lens for first time last weekend, after developing film, all photos were out of focus. I have not had this problem with the other two lenses. Is the problem pilot error with this lens? I focused on distant object and the lens was not on infinity symbol. Any advice would be bloody fantastic."

This is exactly what my problem was on my FED 2 when used with my black finish J-12 lens and I repeated to the OP on how I fixed the problem.

As a caveat, as they say, YMMV. ( your mileage may vary)
Click to expand...


I had this problem with my FED-2 and white bodied 35 lens. I couldn't even get it to infinity. I could feel how RF boot was scratching the lens. And it was very obvious to not to shot with it.

But sure mileage may vary.
I came once at customer site and was re-attaching control cables. I was making sure they are attached tight. And I broke couple of threads just by horsing it in.

This is why I also suggested to open back and inspect it on B. It might be still possible what RF boot is leaving lens RF cam, getting seized between RF cam and lens body and RF is still horsed in all way up to infinity. Or gap between lens RF cam and lens body is so significant it doesn't feel at all.
 
Ko.Fe. said:
I had this problem with my FED-2 and white bodied 35 lens. I couldn't even get it to infinity. I could feel how RF boot was scratching the lens. And it was very obvious to not to shot with it.

But sure mileage may vary.
I came once at customer site and was re-attaching control cables. I was making sure they are attached tight. And I broke couple of threads just by horsing it in.

This is why I also suggested to open back and inspect it on B. It might be still possible what RF boot is leaving lens RF cam, getting seized between RF cam and lens body and RF is still horsed in all way up to infinity. Or gap between lens RF cam and lens body is so significant it doesn't feel at all.
Click to expand...

Opening the back and checking on B is how I found that the camera RF cam was riding high when the J-12 lens was used but worked Ok with the J-8 and I -26 lens and J-3 lens.

I remember past threads of about 10 years ago on this forum, when FSU cameras and lenses still had much exposure here ( before the digital onslaught) and other members reported the same problem with the Fed 2 and J-12 lens combo.
 
The compatibility issue of the FED 2 and J-12 is quite common. My advice would also be to check that the RF arm is riding correctly on the lens cam. If it's not, this is likely the problem. If it is sitting properly, the lens clearly has an issue - it may have been CLA-ed by someone who reassembled it incorrectly, for instance. Checking the arm would provide a simple and rapid way to rule out or confirm the source of the problem.
 
Hi folks, many many many thanks for your comments, I adjusted rf as described in the link provided, all lenses were showing focus at 1 metre and infinity, rolled a short film and developed this evening, no need to scan to see lack of focus in neg with Jupiter 12. Will shoot with all lenses tomorrow, but I'm confident the 12 needs attention.

Mark.
 
Hi folks, i've checked the cam operation on the jupiter 12 using "B" and all looks fine, here are three pics taken today with Jupiter 12, 8 and 11 in the same order. Fomopan 100 in Ilfosol 3 1-14 at 20C for six minutes.
img027.jpg
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Sorry if i've uploaded wrong. I'll get the hang of it eventually.
 
Ground glass, release cable, focusing target print, tripod.
Camera on tripod, release cable attached to the camera, back removed, ground glass attached to the back. Focusing target chart at 45 degree and at one meter. Focusing by ground glass, lens is wide open, with B hold open by release cable. Re-positioning of focus ring to match it. Re-verifying it works as it should with focus on infinity.
 
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