Jupiter 12 and FED-3

ABrosig

ABrosig

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I'm finding myself jonesing for a Jupiter 12 lens and I'm wondering: Are there any fit issues with a FED-3B (lever wind) body? I'm still new to the FSU cameras and I'm curious about the amount of lens that protrudes past the mounting threads and into the body of the camera. Can anyone enlighten me, please? Thanks in advance.
 
It will fit in. The only issue with this lens sometimes is with RF arm. Needs to be bended little bit to make RF focusing work.
It isn't difficult and other lens will work after it as well.
 
You shouldn't have a problem using the J-12. As said above, sometimes the RF sensor arm needs a little help but it's most commonly a problem on the FED 2, for some reason. The lens will fit on all the FSU cameras, there is no problem with the bulging rear element. Just take care not to scratch that rear element with the RF sensor arm as you mount the lens.
 
With my FED3b I had a problem when trying to mount the J12 lens, the RF arm stop on some models is to long (about 1 mm) and will scratch the border of the rear element in infinity position. I had to grind down about 1 mm to be able to mount and uses the J12 with my FED3b. This problem does not appear with all copies of this camera and is related to the sloppy quality control.
 
No problem, a very good combination!

FED3B-j12small.jpg


000037.jpg
 
People worry about the J-12 - "Will it fit?" for almost any camera.

It's a simple rule - if the camera is Leica standard and has no projections into the area in front of the shutter the lens will fit.

If there are projections in front of the shutter (meters, baffles, shelves) then it may, or may not, depending on the particular arrangement of obstructions and the production run of the J-12. Some are slightly shorter than others. Assume the lens will come go close to touching the shutter.

My J-12 fits on my Bessa-R, reportedly an incompatible combination though in reality this depends on the production run of the J-12. Don't bother trying Leica M-5 or CL, all other cameras are worth a (gentle) test IMHO. The Hexar RF will even do TTL metering with a J-12.

This will apply to your digital camera as well - there is no way for the J-12 to hit a digital sensor with an adaptor set to focus a leica-standard lens. It might, potentially, hit an overly thick shutter, though that seems unlikely to me.
 
Scrambler said:
This will apply to your digital camera as well - there is no way for the J-12 to hit a digital sensor with an adaptor set to focus a leica-standard lens. It might, potentially, hit an overly thick shutter, though that seems unlikely to me.
Click to expand...
I'll have to disagree with that, I'm afraid. It cannot be fitted to my Panasonic G2 since the "throat" is too small for the rear element, in front of the shutter. With an extension tube of some sort, maybe but then it wouldn't be much use. I would suggest this probably applies to all micro-4/3 bodies.
 
wolves3012 said:
I'll have to disagree with that, I'm afraid. It cannot be fitted to my Panasonic G2 since the "throat" is too small for the rear element, in front of the shutter. With an extension tube of some sort, maybe but then it wouldn't be much use. I would suggest this probably applies to all micro-4/3 bodies.
Click to expand...

Throat issues - a subset of obstructions in front of the shutter - but that's not the sensor.
 
Scrambler said:
It might, potentially, hit an overly thick shutter, though that seems unlikely to me.
Click to expand...

Scrambler said:
Throat issues - a subset of obstructions in front of the shutter - but that's not the sensor.
Click to expand...
Agreed, it won't hit the sensor. My point was merely that it cannot be fitted to the camera at all, because of the overly-thick shutter that you thought unlikely. I'm not picking an argument, just adding to the information by pointing out that micro-4/3 bodies (at least some) are an issue.
 
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