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Message |
    
Hank
Tinkerer
Username: Hank
Post Number: 10
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2011 - 09:54 am: | 
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(Summaron 3.5cm 1:3.5) I think Leica welded this lens together. As you can see, there are three rings to choose from. I attempted to turn the outermost ring counter-clockwise with a spanner. The spanner slipped and I nearly blasted the tool right through the rear element. I need to clean some haze out of this lens. I dont want to send it in to a profesional..... I want to learn myself. Can someone please give me the beginning sequence for dismantle. Thanks, Henry |
Hank
Tinkerer
Username: Hank
Post Number: 11
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2011 - 07:11 pm: |
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Guys, I asked this same question on another forum photo.net and Im getting a bit of heat. Got into a pissing match with a respected veteran poster and the rest of the crowd is telling me I shouldnt work on this lens. For a newbie like me they say this lens is way out of my league. Any thoughts? |
Nickon51
Tinkerer
Username: Nickon51
Post Number: 143
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2011 - 10:13 pm: |
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The Leica forums can be like an exclusive club, where anyone wanting to repair their own equipment is often regarded as a dirty finger nail'd backyarder.
As a dirty finger nail'd back yarder myself, I encourage careful and informed repair by owners of their own gear. As you pointed out these highly competent specialist repairers are not going to be around forever.
The warnings about the ease with with this high quality equipment can be damaged should be heeded, but senior members engaging in a punctuation slanging match is ridiculous.
Having heeded the damage advice and still wishing to go ahead, I would encourage you do so.
The manual can be downloaded here
www.pentax-manuals.com/manuals/service/leica_m2_service.pdf
I have compiled a partial index of the 35mm lens service proceedures. The PDF page numbers refer to the page thumbnails in the LH pane of the document.
PDF page 39
CHAPTER 3. Disassembly
Section III Lenses
3-13 Disassembly of 35mm lens
PDF Page 70
Chapter 4. Repair and Aligning
Section III Lenses
4.24 Cleaning
4.26 35mm Lens
PDF Page 85
Chapter 5. Reassembly
Section III Lenses
5-21 Reassembly of 35mm Lens
PDF Page 92
Tools for lenses
PDF Page 139
Fig 42. 35 mm lens exploded view.
Best of luck.
Greg |
Hank
Tinkerer
Username: Hank
Post Number: 13
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2011 - 10:28 pm: |
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Nickon .... Good stuff and I like the way you think. That post got out of hand.... too funny though..... hey I was no better at first... I just cant help but to respond with another slick comment. I had to end it. As far as the lens is concerned I actually Have that same manual and even though its not the identical lens it was helpful. So Im all the way down to the element/diaphram. I cant unscrew the one side .... it starts to unscrew but then tightens up to a complete halt. the other side I dont know what to do with. I need to get inside this thing. Please advise. |
Nickon51
Tinkerer
Username: Nickon51
Post Number: 144
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, July 17, 2011 - 11:43 pm: |
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Well the bad news is I don't own one of these lenses so can't specifically help. In general terms, screw the ring back in and check for damaged threads where it has to screw past. Also check that there are no locating pins protruding from the slots in the diaphram housing. As you unscrew that ring, examine carefully that it is the only thing that is turning, that there is no other component inside or underneath that is moving as well.
For lens spanners, I use a piece of industrial hacksaw blade ground to the right length and thinned to fit the slots. You can get some torque good torque if you really need to.
Best of luck
Greg
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Glenn
Tinkerer
Username: Glenn
Post Number: 942
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2011 - 09:05 am: |
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The unfortunate truth is that even after you get into this lens, you may not be able to remove the haze to any good effect. In some cases this haze is a due to a chemical reaction on the glass surface and is normally removed by having the optics repolished etc.
As for the comments from the other forum - well you obviously started to dismantle without the proper manual. The rear element nearly ended up wrecked and because I guess you loosened a ring out of sequence, there is an internal part partially loose that jams up every time you turn the rear outer ring. Nothing new here, most of us have gone down that road at some time or another and ended up with an exotic looking paper weight. However this lens does not really fit the 'lets learn' scenario, there are plenty of cheaper examples of Leitz lenses from this era to learn on. However I wish you luck. |
Hank
Tinkerer
Username: Hank
Post Number: 14
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2011 - 09:16 am: |
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I got the answer. I didnt damage anything .... This last part does not disassemble. It gets flushed with MEK to clean it. Problem is now I dont have the procedure for flushing it. Do I let it soak? If yes... for how long? |
Hank
Tinkerer
Username: Hank
Post Number: 15
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2011 - 12:03 pm: |
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Never mind that last post. It finnaly un-screwed. Haze was cleaned. Lens is alive and well ...... better than ever. Thanks to you all. Next project = Summilux |
Br1078lum
Tinkerer
Username: Br1078lum
Post Number: 114
Registered: 11-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2011 - 08:07 pm: |
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You're a braver man than I, Gunga-Din. Good luck on the Summilux.
PF |
Hank
Tinkerer
Username: Hank
Post Number: 16
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, July 18, 2011 - 08:59 pm: |
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Thank you. No worries about this summilux. Now that I have it open I can see the summaron is more advanced. Even so...the summaron was not so incredibly difficult. Thanks for the support. |
