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sgf323
Joined: 04 Aug 2009
Posts: 5
Location: Omaha, NE
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 Posted: Fri Aug 07, 2009 12:20 am Post subject: Jupiter-37: Bad Focus. Is it possible to repair? |
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sgf323 wrote:
Hey, I'm new to MF lenses and just got my 4th and 5th M42's. A Jupiter-37 (black) and a Helios 44M-4 from ebay. The Helios works fine but the J37 won't focus at all.
The front of the lens was loose. It could shake up/down, left/right. I removed the M42 mount and found that the retaining nut on the rear was loose. I suspect this lens has been taken apart before.
I removed the retaining nut, dropped the lens out of the rear portion but wasn't sure how to disassemble the lens or even what to do if I could get it apart!
I got the two pieces put back together and the lens feels solid but the focus still isn't right. Even in Live View with the aperture closed down it can't attain a sharp focus.
Any suggestions? |
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sgf323
Joined: 04 Aug 2009
Posts: 5
Location: Omaha, NE
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| Posted: Fri Aug 07, 2009 1:38 am Post subject: |
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sgf323 wrote:
WOOOOOOT!!!!
I fixed it! The rear element was in backwards. I popped that out, reversed it, then put the lens back together. Works great now! |
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sgf323
Joined: 04 Aug 2009
Posts: 5
Location: Omaha, NE
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| Posted: Fri Aug 07, 2009 2:06 am Post subject: |
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sgf323 wrote:
Well..... now it can focus fine but it can't focus at Infinity. Hmmmm.... |
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sgf323
Joined: 04 Aug 2009
Posts: 5
Location: Omaha, NE
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| Posted: Fri Aug 07, 2009 3:56 am Post subject: |
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sgf323 wrote:
I believe I got it fixed. I took out 3 of the 4 shims and adjusted the focus by removing the 2 screws in each focus guide and adjusting the unit until the Infinity matched up properly.
It's too dark outside to test it for sure, but I can now focus across my house with room to spare where before I couldn't even get that far! |
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Fri Aug 07, 2009 5:21 am Post subject: |
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hk300 wrote:
Congratulations with your repair.
By the way, welcome to our forum.
Where are you from? Please update your member profile.
_________________
No longer member , please don't try to contact to him |
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my_photography
Joined: 03 Nov 2008
Posts: 2772
Location: Pearl of the Orient
Expire: 2016-12-25
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| Posted: Fri Aug 07, 2009 8:22 am Post subject: |
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my_photography wrote:
Is this your first time fixing Jupiter 37 or have you done it before? You figure out all that by yourself? Amazing and Welcome to the forum.
_________________
Zeiss: CJZ Flektogon 20/2.8, CJZ Flektogon 20/4, , CJZ Pentacon 29/2.8, CJZ Flektogon 35/2.4, CJZ Pancolar 50/1.8, Tessar 50/2.8, Biotar 7.5cm/1.5, CJZ Pancolar 80/1.8, CJZ Sonnar 135/3.5, CJZ Pentacon 135/2.8 CJZ Sonnar 200/2.8
Other Germany: Meyer Primoplan 50/1.8, Meyer Trioplan 100/2.8
Takumar: SMC 50/1.4 Super Tak 55/2, Super Tak 85/1.9, S-M-C 135/3.5, Super Tak 150/4
Russian: Zenith 16/2.8, Mir-24M 2/35, Volna-9 50/2.8, Helios 44M (58/2), Helios 44M-3 MC (58/2), Helios 40 (85/1.5), Tair 11A (135/2.8 )
Others: Sears 28/2.8, Sankor 35/2.8, Enna M�nchen Tele-Ennalyt 135/3.5
Zoom Sigma Zoom 28-85/3.5-4.5
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sgf323
Joined: 04 Aug 2009
Posts: 5
Location: Omaha, NE
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| Posted: Fri Aug 07, 2009 11:59 am Post subject: |
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sgf323 wrote:
This is my first time repairing any lens! Yeah, I figured it out myself after a little while of fiddling with it.
Thanks for the welcome! |
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Spotmatic
Joined: 18 Aug 2008
Posts: 4045
Location: Netherlands
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| Posted: Fri Aug 07, 2009 12:30 pm Post subject: |
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Spotmatic wrote:
| sgf323 wrote: |
This is my first time repairing any lens! Yeah, I figured it out myself after a little while of fiddling with it.
Thanks for the welcome! |
Welcome to the forum, and yes the feeling of repairing a lens all by yourself (without prior experience) is priceless. I know how it feels.
Have fun with your lenses! 
_________________
Peter - Moderator
Pentax K-5 + Pentax 645 + Canon 5D + Bessa RF 10,5cm Heliar, and a 'little' bag full of MF lenses. The lens list is * here *.
My fast 80s: Asahi-Kogaku Takumar 83mm f/1.9 - Super-Takumar 85mm f/1.9 - FA 77mm f/1.8 Limited - Cyclop 85/1.5 (Helios-40 innards) - Komura 80mm f/1.8 - Meyer Görlitz Primoplan 7,5cm 1:1.9 - Carl Zeiss Jena 80mm f/1.8 Pancolar - Canon 85mm f/1.8 S.S.C. - Canon 85mm f/1.2 S.S.C. Aspherical |
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