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carloM42
Joined: 06 Dec 2013 Posts: 9 Location: Italy
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Posted: Tue Jan 07, 2014 10:22 pm Post subject: Porst Weitwinkel 35mm f/3.5 auto F M42 convert to manual |
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carloM42 wrote:
Hi,
I have bought this lens. It is built nicely, all metal, and the focusing ring is one of the smoothest in my m42 lens collection. Since it is an an "auto" only lens I would like to convert it to manual in order to use it on my Pentax K-01 at all apertures. I have already converted a Mamiya Sekor sx 28mm 2.8 by fixing the pin with the ball point pen refill trick but I followed a great tutorial with photos . Instead this lens seems to me more difficult to disassembly and I really don't want to damage it because it is in very good condition. If someone can give me some guidance it would be great!
TIA!
Carlo
PS: sorry, I tried to upload a photo of the lens, but this is my first post and it seems that I cannot upload any photos! |
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carloM42
Joined: 06 Dec 2013 Posts: 9 Location: Italy
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Posted: Thu Jan 09, 2014 6:21 pm Post subject: |
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carloM42 wrote:
I try to add some images. I hope that someone can give me some hints. Maybe I just need to be brave enough to unscrew the small screws on the side. I'm just afraid of not being able to realign the lens (I already had a bad experience with a fujinon 55mm but It was socheap that I didn't care..).
Otherwise I am going to glue the pin
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Lloydy
Joined: 02 Sep 2009 Posts: 7787 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Thu Jan 09, 2014 9:17 pm Post subject: |
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Lloydy wrote:
On a lens that I couldn't get apart I have also glued the pin down. But not with superglue that some people use. I used a contact cement that dries rubbery and can be peeled away. The problem is, it dries slowly. Clean the area around the pin with alcohol and let it dry. drip some contact cement on the pin and push it down with the point of a plastic toothpick, hold until the glue is dry and carefully remove the toothpick. Hopefully there is now a little mound of glue holding the pin down.
The lens I did this on has held for a long time now with no problems at all. Here's a picture taken to show the lens ( Fujinon 55 / 2.2 ) but you can just a small lump on the back face which is the mound of glue.
_________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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carloM42
Joined: 06 Dec 2013 Posts: 9 Location: Italy
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Posted: Thu Jan 09, 2014 10:21 pm Post subject: |
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carloM42 wrote:
Thank you Lloydy, I like your solution!
I didn't want to glue the pin down because I tought that it was not reversible. Now I realize that many different kind of glue exist.
Thank you!
Last edited by carloM42 on Fri Jan 10, 2014 6:30 am; edited 1 time in total |
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kansalliskala
Joined: 19 Jul 2007 Posts: 5037 Location: Southern Finland countryside
Expire: 2016-12-30
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Posted: Fri Jan 10, 2014 6:28 am Post subject: |
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kansalliskala wrote:
Don't unscrew the screws on the side of the lens if you don't know exactly what they are. Usually one ends up with a lens with moving parts you don't want to move.
I'd just buy another m42 adapter with flange for about $10. _________________ MF: Kodak DCS SLR/c; Samsung NX10; OM-10; Canon T50
Zuiko 28/3.5, Distagon 35/2.8; Yashica ML 50/2;
Zuiko 50/1.4; S-M-C 120/2.8; Zuiko 135/3.5; 200/5;
Tamron AD1 135/2.8, Soligor 180/3.5; Tamron AD1 300/5.6
Tamron zooms: 01A, Z-210
Yashicaflex C; Київ 4 + Юпитер 8, 11; Polaroid 100; Olympus XA; Yashica T3
Museum stuff: Certo-Phot; Tele-Edixon 135; Polaris 90-190; Asahi Bellows; Ixus IIs
Projects: Agfa Isolette III (no shutter), Canon AE-1D (no sensor),
Nikon D80 (dead), The "Peace Camera"
AF: Canon, Tokina, Sigma Video: JVC GZ-MG275E |
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carloM42
Joined: 06 Dec 2013 Posts: 9 Location: Italy
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Posted: Fri Jan 10, 2014 8:29 am Post subject: |
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carloM42 wrote:
Hi kansalliskala, yes now I think that I will not try to disassembly the lens. I will also consider the adapter with flange: thank you for the suggestion!
I think that those old lenses are getting more and more rare and it's a pity to run the risk to damage them. |
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