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zewrak
Joined: 12 Apr 2008
Posts: 1212
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 Posted: Fri May 16, 2008 7:18 pm Post subject: Aspiring lens repairenthusiast, roadmap? |
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zewrak wrote:
So, I am leaning to learn how to repair and clean lenses. What lenses are good to learn the craftsmanship with? I don't want to destroy (too many) lenses while learning.
I have no problem reading technicaldocuments for days or read schemes and blueprints until my eyes bleed. I just want to know where to begin.
Anyone walked the line and teached themselves? I am considering to make a series in blogform or somesuch where I document what I do with each lense etc. Because documenting helps learning, I have discovered.
Anyways, I need tips on easy lenses and/or equipement that would be a good beginning. And hopefully not expensive lenses.
Perhaps some people have some cheap lenses they don't care of and that they would bin or not use ever anyways?
Regards,
Zewrak
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Fri May 16, 2008 7:21 pm Post subject: |
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Attila wrote:
Old russian or german lenses has easy and logical constructions. Japanese lenses can be vary many of them glued , this means uncleanable.
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zewrak
Joined: 12 Apr 2008
Posts: 1212
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| Posted: Fri May 16, 2008 7:28 pm Post subject: |
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zewrak wrote:
| Attila wrote: |
| Old russian or german lenses has easy and logical constructions. Japanese lenses can be vary many of them glued , this means uncleanable. |
Would it be easier to start with 50mmish lenses? I understand that they are the easier ones? I got a Pentacon that seem odd with the aperture ring and it glitches a bit, I suppose I could demolish it and try to figure out whats wrong with it.
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Fri May 16, 2008 7:39 pm Post subject: |
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Attila wrote:
Yes, good start.
I cleaned by myself following lenses:
Carl Zeiss Jena Biometar 55mm f2
Orestegor 200mm f4
Konica 135mm f3.5 (glued) lens liquid went to inner element and never be perfect anymore , because I couldn't open glued front elements.
Carl Zeiss Jena Olympia Sonnar 180mm
Novoflex 40 cm f5.6
Might be a few more I don't remember really for others.
I couldn't open any and clean any zoom lenses.
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Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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zewrak
Joined: 12 Apr 2008
Posts: 1212
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| Posted: Fri May 16, 2008 7:53 pm Post subject: |
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zewrak wrote:
Right. I shall consider it for disassembly then.
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Fri May 16, 2008 8:18 pm Post subject: |
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luisalegria wrote:
No need for study !
I suggest you just get broken lenses and work on them. Toujours l'audace !
My repair jobs -
Quantaray Zoom for Olympus - wet and full of sand - cleaned and functional
Old Takumar 50/2.2 semi-auto - broken aperture linkage - still broken, sorry to say, my half-assed part replacement isn't working.
Suntar 135 - conversion to manual aperture - successful
Zeiss Pancolar - fungus inside rear elements - cleaned
Soligor 180 preset - dislocated aperture blades - succesful repair, nice lens !
Upsilon 300/4 - oil on lens, bad aperture, etc. - lenses are clean, but still needs new spring. Lousy lens anyway.
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zewrak
Joined: 12 Apr 2008
Posts: 1212
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| Posted: Fri May 16, 2008 8:44 pm Post subject: |
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zewrak wrote:
| luisalegria wrote: |
No need for study !
I suggest you just get broken lenses and work on them. Toujours l'audace !
My repair jobs -
Quantaray Zoom for Olympus - wet and full of sand - cleaned and functional
Old Takumar 50/2.2 semi-auto - broken aperture linkage - still broken, sorry to say, my half-assed part replacement isn't working.
Suntar 135 - conversion to manual aperture - successful
Zeiss Pancolar - fungus inside rear elements - cleaned
Soligor 180 preset - dislocated aperture blades - succesful repair, nice lens !
Upsilon 300/4 - oil on lens, bad aperture, etc. - lenses are clean, but still needs new spring. Lousy lens anyway.
etc. |
How did you fix oily blades? I fear id break them, they look so fragile :p. How did you convert to manual? Just glued / stuck the pin?
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Fri May 16, 2008 9:35 pm Post subject: |
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luisalegria wrote:
I didn't have a case yet of oily blades - or oily blades that bothered me - as I only use manual aperture.
I did have a couple of cases of dislocated blades, where the blades had popped out of their hinges.
I disassembled and re-assembled the iris in those cases. The blades are not that fragile.
That Suntar has a very simple mechanism. I removed the pin and made the spring that kept the iris open pull in the opposite direction, by relocating the spring hook, so it worked to keep it closed. That way the opening followed the aperture setting, closing as you closed the aperture. |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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