Results 1 to 7 of 7

Thread: Lens design changes

  1. #1
    45-57-617
    Join Date
    Oct 2006
    Location
    Toowoomba, Queensland
    Posts
    643

    Lens design changes

    Hi all,

    I have a query. If you take a shuttered lens, say a Kodak Commercial Ektar, can one assume it to have stayed the same in its dimensions and other physical particulars over the time it was made ?

    ie. If you see an interesting lens on the Bay and it does not have a good shutter on it, can one assume it will fit your version of the shutter eg. Ilex shutters vs Kodak Eastman shutters.

    I bet someone is going to tell me lenses were made with shutters and as a pair they stay. No chopping and changing ...

    So if you have a Ilex #5 can it be swapped for a Kodak Eastman #5 - if you know there are examples of the lens in both shutters ... ?

    It might be a little much to ask a seller to take full measurements (including tpi) of the lens threads ...

    You may imagine I do not want to suck and see because it costs too much !

    Cheers,

  2. #2
    45-57-617
    Join Date
    Oct 2006
    Location
    Toowoomba, Queensland
    Posts
    643

    Re: Lens design changes

    OK would it help to ask whether the Kodak Eastman #5 shutter is equivalent to the Ilex Universal Synchro #5 ??

  3. #3

    Join Date
    Mar 2002
    Location
    Knoxville, Tennessee
    Posts
    1,789

    Re: Lens design changes

    Kodak shutters and Ilex shutters are not the same thread, at least for the Commercial Ektars, the Kodak shutters have larger openings.

    Cheers, Steve

  4. #4

    Join Date
    Dec 2001
    Location
    NJ
    Posts
    7,913

    Re: Lens design changes

    Steve, in general if a lens is in a standard shutter (modern Compur, Prontor, Copal, Seiko) its cells can be put in another standard shutter. In general.

    But there are exceptions. Although standard shutters' lengths, diameters and thread pitches are well standardized, how deeply the cells screw into the shutter can be lens-specific. For example, I just picked up a 60/5.6 Konica Hexanon for the Koni-Omega system. The lens is in a Copal #0; its rear cell goes too deep into all of the other #0 shutters I have on hand. Putting it in a normal ordinary usual #0 will require a shim to get the right cell spacing. I had a similar problem years ago with a 65/8 Ilex and #00 shutters.

    Rochester, EKCo in particular, is in another universe altogether. According to the late Steve Grimes, an Ilex shutter sold to EKCo will not match the equivalent Ilex shutter sold to other customers. But two Ilex shutters of the same size, #5 in your example, sold to EKCo should match.

    All that said, why swap shutters if the bad shutter can be repaired? I have to reshutter that Hexanon because its shutter is set up to be released by the K-O body and has no external release or cable release socket, but my situation isn't yours.

    Cheers,

    Dan

  5. #5
    45-57-617
    Join Date
    Oct 2006
    Location
    Toowoomba, Queensland
    Posts
    643

    Re: Lens design changes

    Thanks Dan and Steve,

    There was only the smallest, faintest glimmer of hope that 'all things would be equal'.

    When you ask, "Why not repair the dud shutter ?" - I think I may have seen it on the Grimes site somewhere that the Kodak shutter was not the Ilex shutter. I think the implication was that the Ilex was the better shutter.

    If there was some measure of confidence that one could take the Kodak shutter off and put an Ilex on then one sleeps a little easier.

    I guess I'll wait till another comes up with a better shutter.

    Cheers,

  6. #6

    Join Date
    Feb 2007
    Location
    Van Buren, Arkansas
    Posts
    1,943

    Re: Lens design changes

    Quote Originally Posted by Steve McLevie View Post
    Thanks Dan and Steve,

    There was only the smallest, faintest glimmer of hope that 'all things would be equal'.

    When you ask, "Why not repair the dud shutter ?" - I think I may have seen it on the Grimes site somewhere that the Kodak shutter was not the Ilex shutter. I think the implication was that the Ilex was the better shutter.

    If there was some measure of confidence that one could take the Kodak shutter off and put an Ilex on then one sleeps a little easier.

    I guess I'll wait till another comes up with a better shutter.

    Cheers,
    While the thread mount of the Kodak specific Ilex shutters and STOCK Ilex shutters is different, the internal mechanism of the shutter (for a given Ilex size) should be the same, and parts from a working Ilex shutter "could" be used to repair a Kodak Ilex shutter. Although I have never seen a shutter on a Kodak Ektar that couldn't be made to work satisfactorily.

  7. #7

    Join Date
    Mar 2002
    Location
    Knoxville, Tennessee
    Posts
    1,789

    Re: Lens design changes

    Kodak shutters are made by Ilex and are labeled so - but the lens cell threads could be different as they were made for Kodak, as they are also labeled.

    Cheers, Steve

Similar Threads

  1. ARCA-SWISS Rm3dŽ succeeds in Red dot Design Award
    By maud ARCA-SWISS in forum New Products
    Replies: 2
    Last Post: 23-Apr-2009, 11:06
  2. Depth of Field Equations, Lens Design Assumptions and Soft Focus Lenses
    By Rory_3532 in forum Lenses & Lens Accessories
    Replies: 8
    Last Post: 3-Mar-2004, 18:00
  3. Replies: 11
    Last Post: 2-Jan-2002, 22:22

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
  •