Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,222   Posts: 1,532,418   Online: 1115
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    colrehogan's Avatar
    Join Date
    May 2004
    Location
    St. Louis, MO
    Shooter
    Large Format Pan
    Posts
    2,016
    Blog Entries
    3
    Images
    16

    Service for LF shutters

    How often is service recommended on shutters used in LF lenses? I'm just wondering as it seems like once I get one CLA'd, another one starts acting up.
    Diane

    Halak 41

  2. #2

    Join Date
    Nov 2005
    Location
    Los Angeles, CA
    Shooter
    Multi Format
    Posts
    5,016
    The answer depends, of course, on how the shutter is being used. My shutters are mostly Copals from the 1980's and are lightly used and carefully stored. They have not been cleaned yet and run "perfectly". Shutters used heavily in professional environments or in the field will likely pick up more dirt, etc and need more frequent cleaning. My plan is generally to wait unitl I see signs of degraded shutter speed in the slow speeds, then send them out for service. But as a non-professional I have that liberty.

    If I were to take a guess, however... I'd guess that a modern shutter, like the Copal, should be good for 5 to 8 years of rugged service before needing cleaning. Compurs might be a little more finicky and need more frequent attention. Older shutters are too unpredictable to tell, in my experience -- some just keep running and running, while others are simply worn-out and need to be put on a shelf.

  3. #3
    Ole
    Ole is offline
    Ole's Avatar
    Join Date
    Sep 2002
    Location
    Bergen, Norway
    Shooter
    Large Format
    Posts
    9,281
    Blog Entries
    1
    Images
    31
    Really old shutters - dial-set Compurs, and early rim-set Compurs - seem to work best with just the right amount of friction between the casing and one of the long moving levers near the "top". Thy will work poorly is the friction is too high (rusty) or too low (oiled). Just about anything else though, and they're great. When one gets too much off, I give it a good cleaning which brings it back within tolerable limits.

    When Compound shutters are fine, they are very fine and very precise. I haven't done anything to mine yet, after they (all 4) were within 10% of set time.

    Later Compurs seem more finicky, and besides some of them have a nasty little spring which likes to jump out and disappear. When one of mine starts to act up, I will send it to Carol Miller.
    -- Ole Tjugen, Luddite Elitist
    Norway

  4. #4
    colrehogan's Avatar
    Join Date
    May 2004
    Location
    St. Louis, MO
    Shooter
    Large Format Pan
    Posts
    2,016
    Blog Entries
    3
    Images
    16
    The shutters that are giving me problems at the moment have been recent Copal 3's. What has happened is that when I open the shutter to focus, it won't close down again. I had this happen to the shutter on my 355 G-Claron a couple of months ago, and now the same thing is happening with the one on my 19 in. Apochromat Artar.
    Diane

    Halak 41

  5. #5
    Ole
    Ole is offline
    Ole's Avatar
    Join Date
    Sep 2002
    Location
    Bergen, Norway
    Shooter
    Large Format
    Posts
    9,281
    Blog Entries
    1
    Images
    31
    Quote Originally Posted by colrehogan
    The shutters that are giving me problems at the moment have been recent Copal 3's...
    Can't help you there - I've owned one single Copal (1) shutter for a total of two weeks so far. And it still works...
    -- Ole Tjugen, Luddite Elitist
    Norway

  6. #6
    naturephoto1's Avatar
    Join Date
    Mar 2006
    Location
    Breinigsville, PA
    Shooter
    Multi Format
    Posts
    1,819
    Images
    84
    I am sorry Diane, of the 10 lenses that I have in Copal shutters, only my Rodenstock f9.0 360mm Apo Ronar is in a Copal 3. I have not had the problem that you are describing with any of the 10 shutters.

    Rich
    Richard A. Nelridge
    http://www.nelridge.com

  7. #7

    Join Date
    Oct 2005
    Shooter
    Large Format
    Posts
    135
    Quote Originally Posted by colrehogan
    The shutters that are giving me problems at the moment have been recent Copal 3's. What has happened is that when I open the shutter to focus, it won't close down again. I had this happen to the shutter on my 355 G-Claron a couple of months ago, and now the same thing is happening with the one on my 19 in. Apochromat Artar.
    My philosophy has always been to send a newly purchased lens (not brand new, of course... but a used one) in for a thorough CLA. It generally doesn't cost that much to have the job done and, if it's done by a competent technician, I'll then have comfort in knowing that it'll be fine for many years to come.

    There's nothing worse than being out into the field, setting up the camera to take a beautiful shot, click the shutter and... nada! Nothing happens or the thing jams up!

    So, to me, the initial CLA is simply an investment in MY time and energy!

    In your situation... it's probably a very minor repair job. Most of my lenses are mounted in Copal 3 shutters and I've not had ANY problem with them in the last 7 years! Knock on wood!

    Cheers

  8. #8

    Join Date
    Jan 2006
    Location
    Los Angeles
    Shooter
    Multi Format
    Posts
    110
    Diane,
    I do all my own shutter CLA's and recondition any and all shutters that I happen to accumulate. Being rather familiar with how the Copals are configured, I think that the problem you are seeing with your Copal 3 has to do with how you store and/or transport the shutter.

    The preview lever of Copals actuate a pin-and-arm arrangement that forces the aperture blades open against spring pressure. As you probably already know, the normal movement is like that of a light switch: Up for light, Down for dark. If the preview lever gets bumped diagonally with sufficient force, the internal linkages may get misaligned. But the action of the return spring sometimes shifts the components back into the normal arrangement, and the problem disappears for a while. Then it comes back again - when you least expect it. If the original source of the problem is severe enough, the internal misalignment will result in the blades locking up. Just curious: How do you normally transport or store your LF lenses?

  9. #9

    Join Date
    Nov 2005
    Location
    Los Angeles, CA
    Shooter
    Multi Format
    Posts
    5,016
    Diane -- I have experienced this "problem" with Copal 3. It isn't necessarily a sign that all has gone wrong with the shutter. But it might be an indication.

    If you feel you have the skills to open the syhutter up, you'll see very clearly the lever that controls the preview function. There is a bit of friction on it and that's why it isn't closing down again. The tiniest smear of a good shutter/watch grease on the sliding surface will fix it right up.

    If you don't feel you have the skills, don't open it up! I haven't sent a shutter to Carol at Flutot's, but her price is certainly more than reasonable(around $50, if I recall correctly) and others have said she is quick, friendly and does a great job.

  10. #10

    Join Date
    Jul 2005
    Location
    Orlando, FL
    Shooter
    Multi Format
    Posts
    415
    Quote Originally Posted by BrianShaw
    "... Carol at Flutot's... her price is certainly more than reasonable(around $50, if I recall correctly) and others have said she is quick, friendly and does a great job..."
    Right... on all counts.

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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