Help with stop down pin

shad309 · Joined: 08 Mar 2008 Posts: 200 Location: Illinois, USA

I have a 200mm that has the auto stop down pin and my adapter has no flange to push it in. Other than buying another M42 adapter or using it wide open, can I adjust it so it is permanently pushed in?

Attila · Joined: 24 Feb 2007 Posts: 13289 Location: Budapest,Hungary

yes
carefully glued is fine
_________________

Olympus E-1,Nikon FA,Pentax MX,Praktica VLC3,Olympus-OM2N,Yashica Eletro 35 GN,Exakta Varex IIb,
-------------------------------------------------------------------------------------------------------------------
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon: 3.5/20mm,2.8/28mm,1.4/35mm,1.4/50mm,1.2/50mm,2/50mm,1.8/105mm,2.5/105mm,2.8/180mm,4/200mm macro,4.5/300mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,1.4/50mm,3.5/55mm macro,2.8/135mm,2/90mm macro,35-70mm,60-250mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan

shad309 · Joined: 08 Mar 2008 Posts: 200 Location: Illinois, USA

should I use something like JB Weld or would you suggest something else? Thanks again!

Attila · Joined: 24 Feb 2007 Posts: 13289 Location: Budapest,Hungary

Any kind of glue is ok what is capable to fix metal and dry fast.Just need to carefully do it, if going inside into the lens it will not works any more.
_________________

Olympus E-1,Nikon FA,Pentax MX,Praktica VLC3,Olympus-OM2N,Yashica Eletro 35 GN,Exakta Varex IIb,
-------------------------------------------------------------------------------------------------------------------
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon: 3.5/20mm,2.8/28mm,1.4/35mm,1.4/50mm,1.2/50mm,2/50mm,1.8/105mm,2.5/105mm,2.8/180mm,4/200mm macro,4.5/300mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,1.4/50mm,3.5/55mm macro,2.8/135mm,2/90mm macro,35-70mm,60-250mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan

shad309 · Joined: 08 Mar 2008 Posts: 200 Location: Illinois, USA

No problem, I thought it could be done that way but wanted to check with others first. Thanks!

Attila · Joined: 24 Feb 2007 Posts: 13289 Location: Budapest,Hungary

Somebody suggested long time ago another solution, I remember it was good , but I don't remember in details.
_________________

Olympus E-1,Nikon FA,Pentax MX,Praktica VLC3,Olympus-OM2N,Yashica Eletro 35 GN,Exakta Varex IIb,
-------------------------------------------------------------------------------------------------------------------
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon: 3.5/20mm,2.8/28mm,1.4/35mm,1.4/50mm,1.2/50mm,2/50mm,1.8/105mm,2.5/105mm,2.8/180mm,4/200mm macro,4.5/300mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,1.4/50mm,3.5/55mm macro,2.8/135mm,2/90mm macro,35-70mm,60-250mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan

Attila · Joined: 24 Feb 2007 Posts: 13289 Location: Budapest,Hungary

Finally I found it...
http://forum.mflenses.com/viewtopic.php?t=4485&highlight=&sid=8742db08375b4e3ff20e4f68db0d482c
Take a look on Rick suggestion.
_________________

Olympus E-1,Nikon FA,Pentax MX,Praktica VLC3,Olympus-OM2N,Yashica Eletro 35 GN,Exakta Varex IIb,
-------------------------------------------------------------------------------------------------------------------
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon: 3.5/20mm,2.8/28mm,1.4/35mm,1.4/50mm,1.2/50mm,2/50mm,1.8/105mm,2.5/105mm,2.8/180mm,4/200mm macro,4.5/300mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,1.4/50mm,3.5/55mm macro,2.8/135mm,2/90mm macro,35-70mm,60-250mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan

shad309 · Joined: 08 Mar 2008 Posts: 200 Location: Illinois, USA

Atilla, that must have been driving you crazy for you to search for that link! I am glad you found it though Laughing

I will be using the Qtip version so that this can be reversed if need be.
I am glad nobody charges a fee to be here, but I would pay if you did!!!

kansalliskala · Joined: 19 Jul 2007 Posts: 117 Location: Hanko, Finland

Try first this thing: first put the aperture to widest possible say 3.5 and push the pin. Then set the aperture like 16 and try again. If there is really much difference in the force needed like that the 3.5 needs much more force, then the super glue could solution could damage the spring mechanism and eventually destroy it?
_________________
AF: Canon, Tokina
M42: Helios-44-2, 44M, Mir 1B, Porst 50, Tele-Edixon 135, Polaris Zoom 90-190, Asahi Bellows
Museum: Certo-Phot
Projects: Agfa Isolette III (no shutter), Canon AE-1D (no sensor)

j.lukow · Posted: Sat May 31, 2008 3:36 am Post subject:

I know this is late but I thought I'd mention it . . .
The Roxsen M42 to MD adapter I use for my Minolta keeps the stop down pin always depressed.
Personally I'm not keen on this, but could be a universal solution if you found the right one.
_________________
Jim's Kit:
Minolta Kit: Minolta X70 & Autowinder G, Minolta SRT200
LENSES:Minolta - 45mm & 50mm F1:2, PF 58mm F1:1.4,
Tamron 28mm f1:2.5, Tamron SP 35-80mm f1:2.8/3.8 & CF TeleMacro zoom 80-210 f1:3.8,
Sigma 25-250 F1:4, AutoImage 135mm F1:2.8, Spiratone 400mm f1:6.3
Start of M42 Kit:Praktica PLC2,Yashica TL Electro X
LENSES:Meyer Goerlitz Oreston 50mm f1:1.8 ,
Auto Yashinon DX 1:1.7 50mm,Steinheil Munchen Culminar 135mm f4.5
Other formats:
Zeiss Contaflex 126 system

kansalliskala · Joined: 19 Jul 2007 Posts: 117 Location: Hanko, Finland

Again. Remember to examine what type the pin-aperture link is. I made a drawing -- >

I think fixing a "Fujinon" type can damage the mechanism.
_________________
AF: Canon, Tokina
M42: Helios-44-2, 44M, Mir 1B, Porst 50, Tele-Edixon 135, Polaris Zoom 90-190, Asahi Bellows
Museum: Certo-Phot
Projects: Agfa Isolette III (no shutter), Canon AE-1D (no sensor)

Poolhall · Posted: Sun Jun 15, 2008 5:09 pm Post subject:

You don't necessarily need the q-tip solution, I used the insulation from electrical wire to do the same job on my Pentacon 29mm, its reversible and seems to hold the pin in place easily.
_________________
Digital: Pentax and Samsung Dslr's
Film: Pentax and Yashica's and a Minox 35
Lenses: Mostly M42 Pentacon and Russian, Some Yashica,Pentax,Ricoh,and some AF.