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Tharos
Joined: 03 Nov 2009 Posts: 322 Location: Istanbul/TURKEY
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Posted: Mon Nov 23, 2009 8:33 pm Post subject: About M42 lenses with A/M and pin |
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Tharos wrote:
I received my second lense which is Jena Tessar 2.8/50.
It has A/M switch and a pin at the back side. It is of course in the M mode but the aperture will not work. A friend warned that the pin must be somehow pressed for the aperture to work. Anyway I try to press the pin with my finger and try to move aperture ring and the aperture do not still change. Surprisingly it sometimes works (even the pin not pressed). What am I missing here? _________________ Camera : Yashica Electro 35 GS, Canon 450D, Konica C35 AF
28mm : Asahi Pentax SMC Takumar F3.5, Yashica ML F2.8
35mm : Distagon F2.8 (soon)
50mm : Carl Zeiss Jena Tessar F2,8 // aus Jena Pancolar F1.8 // SMC Tak F1.4 // Planar F1.7
55mm : Auto-Rikenon F1.8
58mm : Helios 44-3 F2
85mm : Jupiter 9 F2
135mm : Pentacon auto 6-blade F2.8 // Super Tak F3.5 // CZJ Sonnar F3.5 Zebra |
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Excalibur
Joined: 19 Jul 2009 Posts: 5019 Location: UK
Expire: 2014-04-21
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Posted: Mon Nov 23, 2009 9:21 pm Post subject: |
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Excalibur wrote:
Well I only know Myer, Helios and pentax but am sure the principle is the same........The pin is used when the lens is on auto, a lever in the camera body depresses it to the selected F-stop that you have chosen. If you have switched to manual the pin does nothing because the lens is already stopped down. _________________ Canon A1, AV1, T70 & T90, EOS 300 and EOS300v, Chinon CE and CP-7M. Contax 139, Fuji STX-2, Konica Autoreflex TC, FS-1, FT-1, Minolta X-700, X-300, XD-11, SRT101b, Nikon EM, FM, F4, F90X, Olympus OM2, Pentax S3, Spotmatic, Pentax ME super, Praktica TL 5B, & BC1, , Ricoh KR10super, Yashica T5D, Bronica Etrs, Mamiya RB67 pro AND drum roll:- a Sony Nex 3
.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
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Tharos
Joined: 03 Nov 2009 Posts: 322 Location: Istanbul/TURKEY
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Posted: Mon Nov 23, 2009 9:26 pm Post subject: |
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Tharos wrote:
Ok than it means my lense has aperture problem? Sad but true... _________________ Camera : Yashica Electro 35 GS, Canon 450D, Konica C35 AF
28mm : Asahi Pentax SMC Takumar F3.5, Yashica ML F2.8
35mm : Distagon F2.8 (soon)
50mm : Carl Zeiss Jena Tessar F2,8 // aus Jena Pancolar F1.8 // SMC Tak F1.4 // Planar F1.7
55mm : Auto-Rikenon F1.8
58mm : Helios 44-3 F2
85mm : Jupiter 9 F2
135mm : Pentacon auto 6-blade F2.8 // Super Tak F3.5 // CZJ Sonnar F3.5 Zebra |
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Tue Nov 24, 2009 1:07 am Post subject: |
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luisalegria wrote:
Sticky aperture probably. Very common problem.
It may be easy to fix if the lens can be opened so you can reach the aperture blades. A little lighter fluid may be all you need. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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indianadinos
Joined: 06 Jul 2008 Posts: 1310 Location: Toulouse, France
Expire: 2011-12-05
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Posted: Tue Nov 24, 2009 7:42 pm Post subject: |
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indianadinos wrote:
Hi,
Tharos wrote: |
Ok than it means my lense has aperture problem? Sad but true... |
As already said by luisalegria, this is easily fixed: just browse to http://oomz.net/tessar/ and follow the instructions, i have fixed the blades of my Tessar this way
And the Zippo fluid does the job like a charm ...
Cheers _________________ Please visit my blogs Shooting with a Pentax K10D / FF Visions
Takumar: 24/3.5, 28/3.5, 35/2, 35/3.5, 50/1.4, 55/1.8, 85/1.8, 105/2.8, 120/2.8, 135/3.5, 150/4, 200/4
Pentax-K: M28/2.8, K28/3.5, M50/1.4, A50/1.7, M50/4 Macro, K85/1.8, K105/2.8, K135/2.5, M200/4, M70-150/4
Zeiss: Flektogon 20/2.8, 20/4, 35/2.4, 35/2.8, Tessar 50/2.8, Pancolar 50/1.8, Biotar 58/2, Sonnar 135/3.5, Sonnar 180/2.8
Meyer: Primagon 35/4.5, Domiplan 50/2.8, Oreston 50/1.8, Primoplan 58/1.9, Trioplan 100/2.8, Orestor 100/2.8, Orestor 135/2.8
Schacht/Steinheil: Travenar 90/2.8, Travenon 135/4.5, Quinar 135/2.8, Quinar 135/3.5
Russian: MIR 37B, Industar 50/3.5, Helios 44M & 44M-2, Jupiter 37A
P6: Flektogon 50/4, Biometar 80/2.8, Orestor 300/4
Nikkor: Nikkor-O 35/2, Micro 55/3.5, Nikkor-S 50/1.4, Nikkor-Q 135/2.8
Fuji: EBC 28/3.5, EBC 55/3.5 Macro, EBC 135/2.5
Misc Lenses: Kiron 105/2.8 Macro, Tamron SP90/2.5
... and a few other Vivitar, Tamron, Sigma and Soligor lenses ...
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martinsmith99
Joined: 31 Aug 2008 Posts: 6943 Location: S Glos, UK
Expire: 2013-11-18
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Posted: Tue Nov 24, 2009 8:33 pm Post subject: |
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martinsmith99 wrote:
I've given up with them. I had 2 that were the same. I tried to fix one but no dice. I may try again if I acquire one but I think I have this focal length covered (to excess). _________________ Casual attendance these days |
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hexi
Joined: 01 Jul 2009 Posts: 1631 Location: France
Expire: 2011-11-18
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Posted: Tue Nov 24, 2009 8:56 pm Post subject: |
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hexi wrote:
This is surprising problem, but the Tessar is cheap. The best a/m switches i have seen and used so far are on the Helios 44 and the Meyer Oreston, especially that last, even if the pin is a bit "lousy". _________________ Happy owner and user of :
SLR's > Contax Aria - RX
DSLR > Canon 5D
Lenses : C/Y Planar 1.4/50 - Distagon 2.8/35 - Planar 1.4/85
http://www.flickr.com/photos/sonnar85 |
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Mal1905
Joined: 30 Oct 2008 Posts: 1705 Location: Dublin, Ireland
Expire: 2011-11-18
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Posted: Tue Nov 24, 2009 9:56 pm Post subject: |
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Mal1905 wrote:
martinsmith99 wrote: |
...but I think I have this focal length covered (to excess). |
Meet your brother - my collection from 50mm through 55mm to 58mm has become quite crazy really _________________
Canon EOS 5D / EOS 40D
Carl Zeiss Jena: Flektogon 2.8/20, 2.4/35, 2.8/35, Pancolar 2/50, MC 1.8/50, MC 1.8/80, Triotar 4/135, Tessar 2.8/50, S 4/135 1Q, S 3.5/135, Sonnar 3.5/135 MC, 2.8/180, Biotar 2/5,8cm, 2/58, 1.5/75
Carl Zeiss: Distagon 2/28 T*, 1.4/35 T*, Ultron 1.8/50, Tessar 2.8/50, Planar 1.4/50 T* MM, 1.7/50 T* MM, 1.4/85 T* AEG, Sonnar 2.8/135 T*
Asahi Optical Co.: Super-Multi-Coated Takumar 4.5/20, 3.5/24, 3.5/28, 2/35, 3.5/35, 1.4/50, 1.8/55, 1.8/85, 2.8/105, 2.8/120, 2.5/135 I & II, 3.5/135, 4/150, 4/200, 4/300, 5.6/400, 4/45-125, 4.5/85-210, Super-Takumar 4.5/20, 3.5/24, 3.5/28, 2/35, 3.5/35, 1.4/50, 1.8/55, 2/55, 2.8/105, 3.5/135, 4/150, 4/200, 4.5/70-150, Fish-Eye-Takumar 4/17, Macro-Takumar 4/50, Super-Macro Takumar 4/50, Super-Multi-Coated Macro-Takumar 4/50, 4/100, Bellows-Takumar 4/100, Asahi-Kogaku Takumar 3.5/50, 2.4/58, 3.5/100, Asahi-Kogaku Tele-Takumar 3.5/135, Auto-Takumar 2.3/35, 3.5/35, 1.8/55, 1.8/55 (Zebra), 2/55, 2.2/55, 1.8/85, 2.8/105, 3.5/135, Takumar 4/35, 2.2/55, 2/58, 2.8/105, 3.5/135, 3.5/200, 5.6/200, Tele-Takumar 5.6/200, 6.3/300, SMC Takumar 1.4/50, 1.8/55, 2/55, SMC-M 1.4/50, 1.7/50, 2/50
Tomioka: Tominon 2/5cm, Auto-Chinon 3.5/21, 1.4/55, Auto-Yashinon DS-M 1.2/55 |
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lwsy711
Joined: 21 Oct 2009 Posts: 230 Location: VA, US
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Posted: Tue Nov 24, 2009 10:31 pm Post subject: |
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lwsy711 wrote:
Sorry to hijack your post, but I think I got similar question on pk mount lens.
I got my pk mount lens today and the aperture does not move at all when rotating the aperture ring. There is no A/M switch or other switch on the body, how can I change the aperture?
Did not used a lot of pentax manual focusing lenses before, so if this is not a problem with the lens, please forgive me.
Thanks in advance,
Wei _________________ Camera: pentax k7, Olympus E-p1
MF lens:
M42: CZJ 20/4, 35/2.4, 50/1.8, 135/3.5, Super Takumar 35/3.5, Yashinon macro 60/2.8, CZ tessar 80/2.8(Exakta to M42), Vivitar 200/3.5
Pk: Cosinon 55/1,2
Exakta: CZJ biotar 75/1.5, Meyer 100/2.8, Meritar 50/2.9
Praktina: CZJ biotar 75/1.5, Primagon 35/4.5
Praktica: CZJ pancolar 80/1.8 |
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Minolfan
Joined: 30 Dec 2008 Posts: 3436 Location: Netherlands
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Posted: Tue Nov 24, 2009 11:33 pm Post subject: |
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Minolfan wrote:
@ Iwsy: PK aperture has to be kept open by the camera with original mount, the lenses close themself to the indicated aperture when not on camera (or on adapter). So you have a lens with sticky aperture too, that need to be cleaned. |
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lwsy711
Joined: 21 Oct 2009 Posts: 230 Location: VA, US
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Posted: Tue Nov 24, 2009 11:52 pm Post subject: |
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lwsy711 wrote:
Minolfan wrote: |
@ Iwsy: PK aperture has to be kept open by the camera with original mount, the lenses close themself to the indicated aperture when not on camera (or on adapter). So you have a lens with sticky aperture too, that need to be cleaned. |
Minolfan,
Thanks for the information. Let me repeat to see if I understand this correctly.
When the lens is off the camera and without any adapter, rotate the aperture ring should change the aperture anyway, right? So I need to clean the aperture blades in my case? Could this because something connecting the aperture ring and the aperture blade is loose or not hooked up?
By the way, my lens always keeps at the max aperture position.
Regards,
Wei _________________ Camera: pentax k7, Olympus E-p1
MF lens:
M42: CZJ 20/4, 35/2.4, 50/1.8, 135/3.5, Super Takumar 35/3.5, Yashinon macro 60/2.8, CZ tessar 80/2.8(Exakta to M42), Vivitar 200/3.5
Pk: Cosinon 55/1,2
Exakta: CZJ biotar 75/1.5, Meyer 100/2.8, Meritar 50/2.9
Praktina: CZJ biotar 75/1.5, Primagon 35/4.5
Praktica: CZJ pancolar 80/1.8 |
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Wed Nov 25, 2009 6:52 am Post subject: |
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luisalegria wrote:
Hi Wei,
Yes. When you take the lens off the PK camera you should be able to change the aperture by rotating the aperture ring.
Your problem could be a stuck aperture, it could also be a broken or misplaced part of the linkage mechanism. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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lwsy711
Joined: 21 Oct 2009 Posts: 230 Location: VA, US
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Posted: Wed Nov 25, 2009 2:59 pm Post subject: |
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lwsy711 wrote:
luisalegria wrote: |
Hi Wei,
Yes. When you take the lens off the PK camera you should be able to change the aperture by rotating the aperture ring.
Your problem could be a stuck aperture, it could also be a broken or misplaced part of the linkage mechanism. |
Thanks for the information. I confirmed that it is a problem with the oil on the blades that they are gluing themselves together and kept at the max aperture position. So I will need to clean the blades. _________________ Camera: pentax k7, Olympus E-p1
MF lens:
M42: CZJ 20/4, 35/2.4, 50/1.8, 135/3.5, Super Takumar 35/3.5, Yashinon macro 60/2.8, CZ tessar 80/2.8(Exakta to M42), Vivitar 200/3.5
Pk: Cosinon 55/1,2
Exakta: CZJ biotar 75/1.5, Meyer 100/2.8, Meritar 50/2.9
Praktina: CZJ biotar 75/1.5, Primagon 35/4.5
Praktica: CZJ pancolar 80/1.8 |
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