Switch to English Language Passer en langue franšaise Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,300   Posts: 1,535,834   Online: 854
      
Results 1 to 8 of 8
  1. #1
    AndersPS's Avatar
    Join Date
    Jul 2009
    Location
    Ícker÷, Sweden
    Shooter
    35mm
    Posts
    62

    Foucs problems with a Pentax-m 40mm f/2.8!!!

    I┤ve and old 40mm pancake lens and I can┤t focus to infinity! How can I do to fix it? can I do it by myself or should I get a professional to do it?

    ///Anders S

  2. #2
    Ian Grant's Avatar
    Join Date
    Aug 2004
    Location
    West Midlands, UK, and Turkey
    Shooter
    Multi Format
    Posts
    16,247
    Images
    148
    Is the focus screen located properly, some Pentax's have interchangeable screens and these can cause a focus problem.

    Ian

  3. #3
    AndersPS's Avatar
    Join Date
    Jul 2009
    Location
    Ícker÷, Sweden
    Shooter
    35mm
    Posts
    62
    I think it┤s sitting right. I┤ve done a cleaning of it by myself. Perhaps I didn┤t put it back as it should be. I┤ve to check this.

    ///Anders S

  4. #4
    BetterSense's Avatar
    Join Date
    Aug 2008
    Location
    North Carolina
    Shooter
    35mm
    Posts
    2,862
    If you have another Pentax camera, check the lens on that to see if it's the camera or lens.
    f/22 and be there.

  5. #5
    AndersPS's Avatar
    Join Date
    Jul 2009
    Location
    Ícker÷, Sweden
    Shooter
    35mm
    Posts
    62
    Quote Originally Posted by BetterSense View Post
    If you have another Pentax camera, check the lens on that to see if it's the camera or lens.
    Thank you! That was a great idea!

    ///Anders S

  6. #6

    Join Date
    Sep 2004
    Location
    New Jersey (again)
    Shooter
    35mm RF
    Posts
    1,976
    Did you disassemble the lens?

  7. #7
    AndersPS's Avatar
    Join Date
    Jul 2009
    Location
    Ícker÷, Sweden
    Shooter
    35mm
    Posts
    62
    Quote Originally Posted by elekm View Post
    Did you disassemble the lens?
    No, I┤ve not done that! I know there are three screws to unscrew to adjust the focus! Isn┤t it so?

    ///Anders S

  8. #8
    Andrew K's Avatar
    Join Date
    Mar 2010
    Location
    Melbourne, Australia
    Shooter
    Multi Format
    Posts
    507
    Yes - you first remove the name ring (unscrew it using a rubber block/rubber stopper etc) you will see the 3 screws to loosen so you can move the focus ring a little to adjust infinity focus

    But how did you go with the focussing screen - is it sitting correctly? I would check the lens on another camera to see if it is focussing correctly to infinity first. If you don't have another camera I would set the camera to B and check the focus on the film plane with some ground glass (if you don't have ground glass use a piece of frosted sticky tape - run the tape from the top to the bottom of the camera making sure it is stuck to the top and bottom film guides only - you will be surprised how clear the image is to focus on - I use this technique for focussing folding cameras when I've re-lubricated the focussing ring
    A camera is only a black box with a hole in it....

    my blog...some film, some digital http://andrewk1965.wordpress.com/



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  Ś   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin