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Jigt
Joined: 16 Mar 2007 Posts: 412 Location: Belgium
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Posted: Wed Apr 11, 2007 8:25 pm Post subject: Repairing a smc pentax M 50/1.7 |
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Jigt wrote:
This lens is in bad shape!
It has a big dent in the filter ring, because of this the focussing goes very stif?
Behind back and front element are signs of fungus.
I managed to sand of the side so focus works normal, then I made some tools to open the lens.
Now the question, what is the best way to clean the lenses, Maybe some lens cleaning spray for glasses or ???
Guido _________________ nature pictures at www.ranaphoto.net
My pictures in the http://www.pentaxphotogallery.com/guidofranssens |
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Attila
Joined: 24 Feb 2007 Posts: 57839 Location: Hungary
Expire: 2021-11-18
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Posted: Wed Apr 11, 2007 8:32 pm Post subject: |
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Attila wrote:
I cleaned successfully many lens with 50 % Ammonium_hydroxide + 50% hydrogen peroxide mixture. Little smelly Smile , but kill fungus perfectly and clean the lens surface as well. Finish the cleaning with pure alcohol and micro fiber clothes.
Good if you have an lens sucker
http://www.micro-tools.com/Merchant2/merchant.mvc?LTPLanguage=EN&Screen=PROD&Product_Code=LS&Category_Code=LNS&Store_Code=MTE _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
Last edited by Attila on Wed Apr 11, 2007 8:35 pm; edited 1 time in total |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Wed Apr 11, 2007 8:32 pm Post subject: Re: Repairing a smc pentax M 50/1.7 |
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Orio wrote:
Jigt wrote: |
Now the question, what is the best way to clean the lenses, Maybe some lens cleaning spray for glasses or ???
Guido |
No no no!!
No spray for goodness sake. I never cleaned lenses from fungus but based on what I read, a bath in a solution of vinegar in water is an effective way to kill the thing.
Afterwards, I would use the Eclipse product for cleaning the lenses. It is the only product I tried so far, that does not leave halos on lenses in at least 80-90% of cases. _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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montecarlo
Joined: 04 Apr 2007 Posts: 1865 Location: Romania
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Posted: Fri Apr 20, 2007 11:36 am Post subject: Help |
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montecarlo wrote:
Hello,
Could anyone help me with a manual/tutorial regarding the dismantle of a SMC Pentax M 1.7/50 lens. It has some fungus on it (front elements and back ones too sad ). Hope it doesn't have any elements fixed with glue.
I might buy one (Pentax 1.7/50 lens), but it has that problem with the fungus, so first I shall have to reach the lens.
Thank you very much. _________________ Canonet QL17 III
Zenit E , Helios-44 58mm f:2.0 , Tair-11A 135mm f:2.8, Jupiter-9 85mm f:2.0,
Carl Zeiss Jena Flektogon 35mm f:2.4
Pentax MX, ME Super, Chinon CE4/CM4, Petri MC 28mm f:2, smc Pentax-M 50mm f:1.7, Soligor T 135mm f:2.8
Minolta X500, Tokina 28/2.8, Rokkor 50/1.7, 80-205/4.5
Nikon D90, Nikkor 35/2.0, Nikkor 50/1.8, Sigma 24/2.8, Nikkor 18-105 VR |
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Himself
Joined: 01 Mar 2007 Posts: 3209 Location: Montreal
Expire: 2013-05-30
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Posted: Fri Apr 20, 2007 12:26 pm Post subject: Re: Help |
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Himself wrote:
montecarlo wrote: |
Hello,
Could anyone help me with a manual/tutorial regarding the dismantle of a SMC Pentax M 1.7/50 lens. It has some fungus on it (front elements and back ones too sad ). Hope it doesn't have any elements fixed with glue.
I might buy one (Pentax 1.7/50 lens), but it has that problem with the fungus, so first I shall have to reach the lens.
Thank you very much. |
Put up a picture with the lens maybe we come up with some ideas.
Sorin |
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montecarlo
Joined: 04 Apr 2007 Posts: 1865 Location: Romania
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Posted: Fri Apr 20, 2007 12:39 pm Post subject: |
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montecarlo wrote:
Hello and thank you,
I do not have yet the pictures with the lens. I sent a request to the seller to send me the pictures. As soon as I receive the e-mail I shall post them.
Thank you again.
All the best. _________________ Canonet QL17 III
Zenit E , Helios-44 58mm f:2.0 , Tair-11A 135mm f:2.8, Jupiter-9 85mm f:2.0,
Carl Zeiss Jena Flektogon 35mm f:2.4
Pentax MX, ME Super, Chinon CE4/CM4, Petri MC 28mm f:2, smc Pentax-M 50mm f:1.7, Soligor T 135mm f:2.8
Minolta X500, Tokina 28/2.8, Rokkor 50/1.7, 80-205/4.5
Nikon D90, Nikkor 35/2.0, Nikkor 50/1.8, Sigma 24/2.8, Nikkor 18-105 VR |
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LucisPictor
Joined: 26 Feb 2007 Posts: 17633 Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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Posted: Fri Apr 20, 2007 5:45 pm Post subject: Re: Repairing a smc pentax M 50/1.7 |
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LucisPictor wrote:
Orio wrote: |
...Afterwards, I would use the Eclipse product for cleaning the lenses. It is the only product I tried so far, that does not leave halos on lenses in at least 80-90% of cases. |
I agree. The Eclipse cleaning fluid is great! _________________ Personal forum activity on pause every now and again (due to job obligations)!
Carsten, former Moderator
Things ON SALE
Carsten = "KAPCTEH" = "Karusutenu" | T-shirt?.........................My photos from Emilia: http://www.schouler.net/emilia/emilia2011.html
My gear: http://retrocameracs.wordpress.com/ausrustung/
Old list: http://forum.mflenses.com/viewtopic.php?t=65 (Not up-to-date, sorry!) | http://www.lucispictor.de | http://www.alensaweek.wordpress.com |
http://www.retrocamera.de |
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Rob Leslie
Joined: 20 Mar 2007 Posts: 1103 Location: UK Swindon
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Posted: Fri Apr 20, 2007 7:46 pm Post subject: Re: Repairing a smc pentax M 50/1.7 |
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Rob Leslie wrote:
Jigt wrote: |
This lens is in bad shape!
It has a big dent in the filter ring, because of this the focussing goes very stif?
Behind back and front element are signs of fungus.
I managed to sand of the side so focus works normal, then I made some tools to open the lens.
Now the question, what is the best way to clean the lenses, Maybe some lens cleaning spray for glasses or ???
Guido |
As a fun excercise in taking a lens apart and having a mess about it should be good. Otherwise I think the best tool to help you is that container you keep outside the house. We call them dustbins! _________________ Pentax K10D & K100D. Many Tamron Adaptall SP lenses, Fujinon f4.5 400mm. A loved Lens Baby 2, Lubitel triplet +++ and many film cameras. Mainly a Digital user inc G5, GR2
http://robstreet.blogspot.com/
http://robleslie.blogspot.com/
http://roblesliephotography.blogspot.com/
http://www.flickr.com/photos/64956578@N00/ |
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montecarlo
Joined: 04 Apr 2007 Posts: 1865 Location: Romania
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Posted: Sat Apr 21, 2007 12:16 pm Post subject: |
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montecarlo wrote:
Hello,
I found these:
http://homepages.ihug.co.nz/~Srawhiti/pentax50mmf1.4.html
http://www.pentax-manuals.com/manuals/service/servicemanuals.htm
Hope I'll manage to clean it if I'll buy it. _________________ Canonet QL17 III
Zenit E , Helios-44 58mm f:2.0 , Tair-11A 135mm f:2.8, Jupiter-9 85mm f:2.0,
Carl Zeiss Jena Flektogon 35mm f:2.4
Pentax MX, ME Super, Chinon CE4/CM4, Petri MC 28mm f:2, smc Pentax-M 50mm f:1.7, Soligor T 135mm f:2.8
Minolta X500, Tokina 28/2.8, Rokkor 50/1.7, 80-205/4.5
Nikon D90, Nikkor 35/2.0, Nikkor 50/1.8, Sigma 24/2.8, Nikkor 18-105 VR |
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Jigt
Joined: 16 Mar 2007 Posts: 412 Location: Belgium
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Posted: Sun Apr 22, 2007 5:56 pm Post subject: |
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Jigt wrote:
Thanks all,
The first clean is done and the first pics are made.
Its a succes, the fungus behind the front element ist not cleaned yet.
becausse of the damage of the filter tread i can't open the lens.
Guido _________________ nature pictures at www.ranaphoto.net
My pictures in the http://www.pentaxphotogallery.com/guidofranssens |
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Jigt
Joined: 16 Mar 2007 Posts: 412 Location: Belgium
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Posted: Sun Apr 22, 2007 7:38 pm Post subject: quick result |
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Jigt wrote:
Quicly made before dark!
both shots wide open
Guido _________________ nature pictures at www.ranaphoto.net
My pictures in the http://www.pentaxphotogallery.com/guidofranssens |
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Attila
Joined: 24 Feb 2007 Posts: 57839 Location: Hungary
Expire: 2021-11-18
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Posted: Sun Apr 22, 2007 7:44 pm Post subject: |
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Attila wrote:
Yes, seems a good lens! _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Sun Apr 22, 2007 8:01 pm Post subject: |
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Orio wrote:
Those linden leaves are beautifully detailed. _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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peterqd
Joined: 28 Feb 2007 Posts: 7448 Location: near High Wycombe, UK
Expire: 2014-01-04
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Posted: Sun Apr 22, 2007 9:28 pm Post subject: |
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peterqd wrote:
Orio wrote: |
Those linden leaves are beautifully detailed. |
For a lens with fungus this is a remarkable picture. It makes you wonder if it's worth worrying about a little fungus
In England this tree species (Tilia) is called a Lime. I never understood the logic for this, because the Lime fruit comes from a completely different species (Citrus).
Did you know that new, light green Linden leaves are good to eat as salad? |
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TDN
Joined: 26 Mar 2007 Posts: 321 Location: Belgium
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Posted: Sun Apr 22, 2007 9:49 pm Post subject: |
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TDN wrote:
Nice, seems to work
To stop the fungus from getting worse, you might want to try and kill it. You can do this by putting the lens straight up on a piece of aluminium foil with the caps removed on a sunny day.
Leave it there for a whole day and you should be good. The sun reflects on the foil and the UV kills the fungus inside the lens.
(some say you best wrap up the outside of the lens in foil too, to avoid it getting too hot and elements getting out of place) _________________ ---
TDN - tdn9.be
---
SLR: Nikon EM , Pentax K2 DMD, K1000, MZ-5
DSLR: Pentax K10D
Lenses (Nikon): E-series 1.8 50mm & 100mm f2.8; Tokina RMC 80-200mm f4
Lenses (Pentax): Pentax 17mm f4.0 Fish-eye; Pentax-A 50mm f1.7; Kiron 105mm f2.8 macro; Pentax-FA 50mm f1.4; Pentax-A 35-135mm f3.5-4.5; Sigma 28-70mm f2.8 EX Aspherical; DA 18-55mm f3.-5.6; Tamron 28-200mm f3.8-5.6 XR;
Lenses (M42): Jupiter-9 85mm f2; Pentacon 200mm f4;
Lenses (Adaptall): Tamron SP 60-300mm f3.8-5.6; Tamron SP 80-200mm f2.8 LD |
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Attila
Joined: 24 Feb 2007 Posts: 57839 Location: Hungary
Expire: 2021-11-18
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Posted: Sun Apr 22, 2007 9:52 pm Post subject: |
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Attila wrote:
TDN wrote: |
Nice, seems to work
To stop the fungus from getting worse, you might want to try and kill it. You can do this by putting the lens straight up on a piece of aluminium foil with the caps removed on a sunny day.
Leave it there for a whole day and you should be good. The sun reflects on the foil and the UV kills the fungus inside the lens.
(some say you best wrap up the outside of the lens in foil too, to avoid it getting too hot and elements getting out of place) |
I tried this way to kill fungus, didn't helped. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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robar
Joined: 25 Mar 2007 Posts: 90 Location: Dallas area, Texas
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Posted: Tue May 08, 2007 8:40 pm Post subject: |
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robar wrote:
i've tried it and it works great. guess it's our god hot Texas sun.
i just broke down a smc M50/2. it was a piece of cake.
filter ring can sometimes be aligned by taking a jigsaw and cutting into a piece of wood the correct diameter in it for the lens in question. place the bent part in the cut out and using a wooden dowel placed on the bend and lightly striking the dowel with a hammer. best done with two people. _________________ Roy
http://www.texasbostons.com/
http://picasaweb.google.com/roysphoto |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Tue May 08, 2007 8:51 pm Post subject: |
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Orio wrote:
Like all earth creatures fungus need oxygen, so deprive them of oxygen, deep bath the lenses in pure vinegar for at least one day, this is reported to work, otherwise Attila can give you his chemical recipe which will be even more aggressive.
On a slightly different subject, a popular remedy here ro remove fungus attacking pans and cups due to non perfect washing and/or storing in dark closets, is to use vinegar. Housewomen have used this for centuries so it must have some validity _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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Flor27
Joined: 13 Sep 2007 Posts: 1195 Location: Paris, France
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Posted: Thu Oct 04, 2007 11:04 am Post subject: |
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Flor27 wrote:
Hi,
Attila wrote: |
I cleaned successfully many lens with 50 % Ammonium_hydroxide + 50% hydrogen peroxide mixture. |
Would you please give us the respective concentration of ammonium hydroxide and hydrogen peroxide ?
Thanks !! _________________ Switching from M42 to Minolta MD & Contax/Yashica |
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Attila
Joined: 24 Feb 2007 Posts: 57839 Location: Hungary
Expire: 2021-11-18
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Posted: Thu Oct 04, 2007 11:59 am Post subject: |
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Attila wrote:
Highest available in special shops don't know exactly higher than household ammonia. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Flor27
Joined: 13 Sep 2007 Posts: 1195 Location: Paris, France
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Posted: Thu Oct 04, 2007 12:25 pm Post subject: |
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Flor27 wrote:
For sure
I will ask to my pharmacist. _________________ Switching from M42 to Minolta MD & Contax/Yashica |
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