Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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 Posted: Thu Jun 11, 2009 10:52 am Post subject: MIR-20 Journal * Updated with sample photos * |
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Krisgage wrote:
This is about the new lens I got recently. Its pretty long. 
Here :
On Tuesday, I went to the usual antique shop that I frequently go. The shop owner was excited to see me and told me he got good stuff for me. I asked him what it is; he told me it's a fisheye lens. That got me excited and when he was taking it out for me; the lens does resemble a fisheye lens. Upon closer look, it is not after all. It is just a 20mm f3.5 lens with huge front glass and head. I took it as I need a wide angle lens. The price was reasonable.
When I got home, I was enthusiastic to make the lens work on my E-510. The first thing I did was unscrewing the screws holding the mount plate. The mount looks interesting which I had not see before. Besides that, the lens lacks of aperture ring. I was intending to use my M42 or 4/3 mounting plate from my scrapped lenses for this lens. However, none of those mounting plates able to fit the lens mount as it is narrower. Then I tried putting it back and think of an alternative ways. While doing so, I accidentally turn the focus ring and lens head. Out of sudden, the lens fell off from the helicoids! Oh no! More problems!
It took me quite a long while to figure out how to put it back. I tried screwing it back into the helicoids, it works but the focus ring won’t move at all. The last resort was disassembled the whole lens, the glasses and retaining rings. This method works. I able to remove the “core” or main lens group to have a clearer view of the connections between the helicoids and the part holding the “core”. After 4 hours, I finally completed connecting back the helicoids and the part holding the “core” and thus focus ring is working again. The thing I learned was that the mount plate actually had the “stopper” for the part holding the “core” going beyond infinity. It is the main part or key locking everything in place. I was silly to remove it in the first place and by turning the focusing ring, the whole thing came apart.
Now I had it fixed back, the next issue was the mount. I went online and search for more clues about the mount. Initially, I got nothing, perhaps due to the Russian text on the lens. I went to search for Russian alphabet and realize that it is actually MIR-20 ABTOMAT or Automat, 20mm f-3.5. It is a lens for Kiev-10 and Kiev-15 cameras. The unique thing about this lens is that, the aperture was controlled by the Kiev cameras, thus explains the lack of aperture ring. It had 8-group 9-elements weighing 490g.
I was fortunate that the rear cap for this lens had the actual mount. I just need to unscrew the 4 screws holding the metal mount. I tried mount the metal mount on the lens itself and stuck on the mounting side of the 4/3 extension tube to see it fits. To my surprise, it got stuck! Now the whole mount was stuck firm, tight and secured on the mounting side of the 4/3 extension tube. I leave it as it is and tried mounting on E-510 and it works. The picture taken were soft though and not sharp at infinity. I wonder if I did not set the lens properly on the helicoids. Nevertheless, I am happy it works after all after so much trouble and time used.
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Photos and Lenses Journal
http://krisgage.livejournal.com
Last edited by Krisgage on Fri Jun 12, 2009 10:08 am; edited 1 time in total |
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estudleon
Joined: 15 May 2008
Posts: 3754
Location: Argentina
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| Posted: Thu Jun 11, 2009 11:39 am Post subject: Re: MIR-20 Journal |
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estudleon wrote:
| Krisgage wrote: |
This is about the new lens I got recently. Its pretty long.
Here :
On Tuesday, I went to the usual antique shop that I frequently go. The shop owner was excited to see me and told me he got good stuff for me. I asked him what it is; he told me it's a fisheye lens. That got me excited and when he was taking it out for me; the lens does resemble a fisheye lens. Upon closer look, it is not after all. It is just a 20mm f3.5 lens with huge front glass and head. I took it as I need a wide angle lens. The price was reasonable.
When I got home, I was enthusiastic to make the lens work on my E-510. The first thing I did was unscrewing the screws holding the mount plate. The mount looks interesting which I had not see before. Besides that, the lens lacks of aperture ring. I was intending to use my M42 or 4/3 mounting plate from my scrapped lenses for this lens. However, none of those mounting plates able to fit the lens mount as it is narrower. Then I tried putting it back and think of an alternative ways. While doing so, I accidentally turn the focus ring and lens head. Out of sudden, the lens fell off from the helicoids! Oh no! More problems!
It took me quite a long while to figure out how to put it back. I tried screwing it back into the helicoids, it works but the focus ring won’t move at all. The last resort was disassembled the whole lens, the glasses and retaining rings. This method works. I able to remove the “core” or main lens group to have a clearer view of the connections between the helicoids and the part holding the “core”. After 4 hours, I finally completed connecting back the helicoids and the part holding the “core” and thus focus ring is working again. The thing I learned was that the mount plate actually had the “stopper” for the part holding the “core” going beyond infinity. It is the main part or key locking everything in place. I was silly to remove it in the first place and by turning the focusing ring, the whole thing came apart.
Now I had it fixed back, the next issue was the mount. I went online and search for more clues about the mount. Initially, I got nothing, perhaps due to the Russian text on the lens. I went to search for Russian alphabet and realize that it is actually MIR-20 ABTOMAT or Automat, 20mm f-3.5. It is a lens for Kiev-10 and Kiev-15 cameras. The unique thing about this lens is that, the aperture was controlled by the Kiev cameras, thus explains the lack of aperture ring. It had 8-group 9-elements weighing 490g.
I was fortunate that the rear cap for this lens had the actual mount. I just need to unscrew the 4 screws holding the metal mount. I tried mount the metal mount on the lens itself and stuck on the mounting side of the 4/3 extension tube to see it fits. To my surprise, it got stuck! Now the whole mount was stuck firm, tight and secured on the mounting side of the 4/3 extension tube. I leave it as it is and tried mounting on E-510 and it works. The picture taken were soft though and not sharp at infinity. I wonder if I did not set the lens properly on the helicoids. Nevertheless, I am happy it works after all after so much trouble and time used. |
Congratulations!!!
Sure that you spent time and answered complicated questions.
Well done, man!!
What about the controlled apertures? Did you think anything to resolved it?
Good luck, and show pics please.
Rino.
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Konica 2,8/100
CZJ: 4/20, 2,4/35, 1,8/50 aus jena, 3,5/135MC, Pentacon 1,8/50
Pentax S-M-C-1,4/50
Helios 44-3
Mamiya 2,8/135
Misc. : jupiter 9
Stuff used:
A) SRL
Alpa 10 D - kern macro Switar 1,9/50 -black, Kilffit apochromat 2/100.
Asahi pentax spotmatic super takumar 1,4/50
Contaflex super B tessar 2,8/50 Pro-tessar 115
Leica R3 electronic summicron 2/50 elmarit 2,8/35
Konica Autoreflex 3 (2 black and chrome one), TC, T4. 2,8/24, 3,5/28 not MC and MC, 1,8/40, 1,4/50, 1,7/50 MC and not MC, 1,8/85, 3,2/135, 3,5/135, 4/200
Minolta XG9 2,8/35, 2/45, 3,5/135
Nikkormat FTn 1,4/50, 2,8/135
Fujica ST 801, 605, 705n. 3,5/19, 1,4/50, 1,8/55, 4/85, 3,5/135.
Praktica MTL 5 and a lot of M42 lenses.
Voigtlander. Bessamatic m, bessamatix de luxe, bessamatic cs, ultramatic and ultramatic cs.
Skoparex 3,5/35, skopagon 2/40, skopar 2,8/50, skopar X 2,8/50, super lanthar (out of catalogue) 2,8/50, dinarex 3,4/90, dinarex 4,8/100, super dinarex 4/135, super dinarex 4/200, zoomar 2,8/36-83, portrait lens 0, 1 and 2. Curtagon 4/28 and 2,8/35
Canon AV1, 1,8/50
Rolleiflex SL35 and SL35 E. 2,8/35 angulon, 2,8/35 distagon, 1,4/55 rolleinar, 1,8/50 planar, 4/135 tessar, 2,8/135 rolleinar, x2 rollei, M42 to rollei adap.
Etc.
RF
Yashica Minister III
Voightlander Vito, vitomatic I, Vito C, etc.
Leica M. M2, M3 (d.s.) and M4. Schenider 3,4/21, 2/35 summaron 2,8/35 (with eyes). Summicron 2/35 (8 elements with eyes), 2/35 chrome, 2/35 black, 1,4/35 pre asph and aspheric - old -, 2/40 summicron, 2,8/50 elmar, 2/50 7 elements, 2/50 DR, 2/50 - minolta version, 1,4/50 summilux 1966 version, 1,4/75 summilux, 2/90 large version, 2/90 reduced version of 1987, 2,8/90 elmarit large version, 4/135 elmar. |
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