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Tinkerer
Username: Menos
Post Number: 1
Registered: 08-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, August 26, 2011 - 12:02 am: | 
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I am stuck with opening a version 2 Leitz 7.3cm Hektor ƒ1.9.
I need, to open the optical cell, to clean out slight haze on the elements, near the aperture + clean out debris form the brittle antireflective paint inside the cell.
The second issue, where I am stuck is the disassembly of the focussing mount.
At this stage, I am this far:
- remove optical cell
- remove beauty ring in front of focussing mount, revealing:
- three screws, which connect the focus ring with the focus mount
I can slip the focus ring now, but cannot remove it completely, as (I suppose) an assembly of the nickel distance scale has to be removed first.
The Nickel distance scale does have a Ø1.4mm hole (I presume for a tool like a hook wrench, to untwist the Nickel distance scale from the focus ring).
Is this assumption correct?
My priority one, to bring this lens back to working order is the focus mount, which has to be cleaned and re-lubed.
Here are a few (small) pictures from the disassembly:
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 16-Hektor%2073%20f1.9%20-%20focus%20mount.jpg
The focussing mount after removing the entire optical cell (just unscrews counter clockwise).
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 21-Hektor%2073%20f1.9%20-%20focus%20mount%20-%20screws.jpg
The focussing mount, showing it's screw positions - from left to right:
round fitting (possibly for hook wrench for unscrewing the nickel distance scale from the ribbed brass focussing ring, to remove the focussing ring from the left side (after removing the beauty ring and removing the three grub screws, connecting the focussing ring + distance scale to the focussing mount) - still investigating.
Next is one of two grub screws, securing a thin brass cover tube, which possibly can be slid out of the way, once, the focussing ring is removed (didn't get that far, as I miss the proper tool, to remove the nickel distance scale from the focussing ring)
Right - one of three more substantial screws, securing the focus mount outer barrel including L39 mount to an inner brass tube (didn't get that far).
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 22-Hektor%2073%20f1.9%20-%20focus%20mount%20-%20inside.jpg
Inside the focussing mount from the front - [B]what do I see here?[/B]
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 11-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20removed%20front%20element.jpg
The front element just unscrews from the main barrel.
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 17-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20screw%20positions.jpg
The optical cell, front element removed (left side), showing screw positions (screws removed) of aperture scale tube (left) and (likely) one of the securing screws of the rear group.
This one is still open to me - any input on how to remove the rear group, to dig to the aperture is welcome. I have to get inside, to clean haze on the elements next to the aperture and clean out paint debris (possibly also repainting anti reflective painting in the process).
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 13-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20aperture%20ring.jpg
Optical cell with removed front element, showing aperture ring with one of two aperture linkage pins and the removable aperture scale.
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 20-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20screws%20for%20aperture%20scale %20tube,%20aperture%20linkage%20and%20rear%20group.jpg
Screws - the aperture scale securing screw (top), the two aperture ring linkage pins (right), the two screws, fitting near the rear group, securing the aluminum barrel to a brass tube, fitting inside the barrel (still investigating this assembly).
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 14-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20aperture%20ring%20aperture%20sc ale%20tube%20screw%20position.jpg
Aperture ring and the screw position for the one securing screw of the aperture scale tube, which can be slid off the barrel, once the screw is removed (after having removed the front element).
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 32-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20trapped%20paint%20debris.jpg
Some of the paint debris inside the optical cell
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 33-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20aperture%20ring%20removed.jpg
The barrel after removing the aperture scale tube and aperture ring (which rides on the right thread, while actuating the aperture via the two connecting pins through the slit, fitting into a hole - each pin).
You see the slit for the pins, reaching through the lens main barrel and the hole for the aperture scale securing screw.
http://www.teknopunk.com/images/2011-08-23%20Hektor%2073%20f1.9%20-%20CLA/_DSC34 36-Hektor%2073%20f1.9%20-%20optical%20cell%20-%20Schneideritis.jpg
Some "Schneideritits" I guess
Any input on how to open the optical cell, to get to the aperture and the focussing mount is very welcome. |
