Results 1 to 8 of 8

Thread: Swapping shutters

  1. #1

    Swapping shutters

    I have a super-angulon 90mm 1:8 lens and the shutter (copal0) stopped working. I also have a spare copal0 5.6 shutter. My question is, if a put the cells into the 5.6 shutter, how far off will my actual f stops be?

  2. #2
    Deardorff Sales and service
    Join Date
    Aug 2010
    Location
    Indiana
    Posts
    414

    Re: Swapping shutters

    Quote Originally Posted by rich caramadre View Post
    I have a super-angulon 90mm 1:8 lens and the shutter (copal0) stopped working. I also have a spare copal0 5.6 shutter. My question is, if a put the cells into the 5.6 shutter, how far off will my actual f stops be?
    They are mechanicaly the exact same shutter. Hopefully If you swap the F stop scale everything should line up just fine.
    Ken Hough Deardorff Refinisher since 1982
    Deardorff Factory refinisher / remanufacturer 1982-88
    Deardorff Factory Historian 82-88
    Deardorff Cameras on Facebook
    www.deardorffcameras.0catch.com

  3. #3

    Re: Swapping shutters

    My mistake. They are both synchro-compur shutters. The original one is 8 thru 64. The replacement one is 5.6 thru 45. The f stop scale is printed directly onto the shutter. So I can't switch them. If these are mechanically the same dose that mean 5.6 on the replacement shutter would really be 8 for my lens cells?

  4. #4
    Jon Shiu's Avatar
    Join Date
    Nov 2003
    Location
    Mendocino, California
    Posts
    1,317

    Re: Swapping shutters

    because different lenses have different designs, you probably can't tell if they both start their scales at the same physical aperture size

    Jon
    my black and white photos of the Mendocino Coast: jonshiu.zenfolio.com

  5. #5

    Join Date
    Mar 2010
    Location
    New Jersey, USA
    Posts
    419

    Re: Swapping shutters

    Shouldn't it be possible to simply swap the front plate between the two shutters? At that point wouldn't everything work as it should?

    Dan

  6. #6
    Deardorff Sales and service
    Join Date
    Aug 2010
    Location
    Indiana
    Posts
    414

    Re: Swapping shutters

    Quote Originally Posted by Fotoguy20d View Post
    Shouldn't it be possible to simply swap the front plate between the two shutters? At that point wouldn't everything work as it should?

    Dan
    Yes that should work just fine. But I would have him use a local repair person. The speed ring on those can come off and there are a couple of springs that might come out of their retaining groove.
    Ken Hough Deardorff Refinisher since 1982
    Deardorff Factory refinisher / remanufacturer 1982-88
    Deardorff Factory Historian 82-88
    Deardorff Cameras on Facebook
    www.deardorffcameras.0catch.com

  7. #7

    Join Date
    Jan 2002
    Location
    Besançon, France
    Posts
    1,617

    Re: Swapping shutters

    Hi Rich !

    You can swap the shutters and check with the new one thar 'new 5.6' actually (or not !) corresponds to the max aperture of the lens, the one that was labeled '8' with the previous shutter.
    If the shutter is exactly the same, i.e. the controls of the iris blades are exactly the same from a mechanical point of view, only the labels & engravings change, hence, the probability that "new 5;6" reads "actual 8", etc ... and "new 45" is "actual 64" is very high .. but has to be checked.

    Probably your Compur shutter does not have equidistant f-stop engravings like modern shutters, but it is easy to check whether "new 5;6" corresponds to "old 8' and so on.

    Personally I would have more concern about retaning the initial lens sharpness: be careful when you unscrew the front cell, if a tiny & very thin spacer ring comes off, keep it preciously and re-install it back at the same place on the new shutter.
    If no spacer ring is found probably you can probably swap shutters safely yourself without much concern.

  8. #8

    Re: Swapping shutters

    So here is what I did. I set both shutters on on the table and put them on f16. I could see opening on the old (jammed) shutter wass a bit bigger than the new one. I opened the new one up a half a stop (f11 1/2) and it matched the old one. At least to my eye. I shot a few sheets of e6 and they looked good. Luckily I work at a lab so I can process my film quickly. So for now I'm going with opening up a half stop. Just one more think to remember out in the field.

    Rich

Similar Threads

  1. Swapping shutters / aperture scales?
    By Ben Syverson in forum Lenses & Lens Accessories
    Replies: 11
    Last Post: 15-Mar-2009, 13:15
  2. Swapping shutters.
    By poco in forum Lenses & Lens Accessories
    Replies: 6
    Last Post: 20-Sep-2007, 05:23
  3. Problem Swapping Shutters
    By Mark Stahlke in forum Lenses & Lens Accessories
    Replies: 4
    Last Post: 18-Jun-2007, 15:50
  4. Nikkor shutters
    By bobc in forum Lenses & Lens Accessories
    Replies: 15
    Last Post: 29-Jul-2006, 13:10
  5. LCD shutters - any experience? 4x5 FP shutters?
    By bglick in forum Lenses & Lens Accessories
    Replies: 16
    Last Post: 14-Aug-2005, 08:09

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •