Jupiter 3/8 questions

ronang · 08-27-2007

Do all version of these lens have their aperature rings rotate when the focusing rings are turned? Or are there versions where the aperture rings stays still?

rolleistef · 08-27-2007

I think earlier versions had a simple helicoid, thus the whole lens turns, later versiosn may have been fitted with a double helicoid so the lens stays still. FSU specialists will certainly give you more details (Noel?)

varjag · 08-27-2007

Actually, it is the later (black) J-8s that have simpler focusing mounts: those turn the whole lens module as they focus.

principe azul · 08-27-2007

It's quite cool seeing a vented hood turn round in the viewfinder...

I gather the earlier chrome ones don't turn, and the later black ones do, but I'm no expert. pshinkaw reckons the same:

http://www.rangefinderforum.com/foru...ead.php?t=9822

My black J-8, 1980s vintage, has two aperture scales 180 degrees away from each other, so one is always visible. It seems typical from photos of other black J-8s.

edit ¦ oops, thought this was just J-8s, to which the answer above applies - with J-3s, I understand they never rotate (I have a chrome '56 and a black '84)

wolves3012 · 08-27-2007

Quote:

Originally Posted by rolleistef

I think earlier versions had a simple helicoid, thus the whole lens turns, later versiosn may have been fitted with a double helicoid so the lens stays still. FSU specialists will certainly give you more details (Noel?)

The reverse is true - early ones have stationary aperture rings due to the more complex helicoid design, later ones have a simple helicoid and the whole barrel and front rotates. The early ones are very similar to the Industar 26/61 in mechanical design.

payasam · 08-27-2007

My J-3, N59xxxxx, is chrome and has a non-rotating mount. LTM.

Bavaricus · 08-27-2007

Quote:

Originally Posted by principe azul

My black J-8, 1980s vintage, has two aperture scales 180 degrees away from each other, so one is always visible. It seems typical from photos of other black J-8s.

Mine from 1975 too!

alternatve · 08-27-2007

I have a '62 version that has a non rotating front. It's also in LTM and silver in colour, so I think they changed something more then the colour when they swtiched to black.

It is also very sharp, but that's another question.

ronang · 08-27-2007

Thanks to all that replied. The reason that I was asking is that I have a black one that rotates and I hate that, coupled to fact that the aperature turns in the opposite direction of other lenses made for LTM that I have. I always have to take my eyes off the view finder to check the aperature setting (no clicks to count either).

So looks like it off to ebay to get a silver one!

wolves3012 · 08-28-2007

Quote:

Originally Posted by ronang

Thanks to all that replied. The reason that I was asking is that I have a black one that rotates and I hate that, coupled to fact that the aperature turns in the opposite direction of other lenses made for LTM that I have. I always have to take my eyes off the view finder to check the aperature setting (no clicks to count either).

So looks like it off to ebay to get a silver one!

Have a careful look then, I think some of the aluminium ones are identical to the black ones, minus the paint!

If you complain about the reverse-direction aperture, it's true for all Jupiters compared to Industars anyway. Also the Kiev focusses oppositely to the FEDs and Zorkis!