Results 1 to 8 of 8

Thread: Finding #3 shutter for G-Claron 355mm f/9

  1. #1

    Join Date
    May 2019
    Location
    Stockholm
    Posts
    205

    Finding #3 shutter for G-Claron 355mm f/9

    My newest acquisition just arrived. A G-Claron 355mm f/9, in a very nice condition. And acquired for not much more than a song.
    Barrel mounted though, so I have to find a shutter, to fit it for my 4x10 Chamonix.

    I just assumed that I can move the front and back cells to a #3 shutter and all will be well. (As I've done with my 150, 210 and 240 Clarons, that I also got barrel mounted).

    But how to get a #3 shutter (#0 and #1 shutters I have plenty to swap around)?
    The first thing that comes to my mind is buying one, with a lens, from the big auction site. Shutters alone seems to be very scarce. A fair one with a 240 Nikkor W or similar would cost somewhere around $300 to $400.

    Manageable perhaps, but still I don't need another 240. And then I would pay double for that shutter compared with the lens.

    Perhaps I'm missing some obvious way to find a shutter in another way?
    Or not....

  2. #2

    Join Date
    Jul 2001
    Location
    San Francisco, CA
    Posts
    712

    Re: Finding #3 shutter for G-Claron 355mm f/9

    $300 for decent Copal 3, even if it has a Nikon W 240 in it, is a fair price. Depending on the age of your 355 G Claron it may fit into a Copal 3S.

  3. #3

    Join Date
    Dec 2018
    Posts
    443

    Re: Finding #3 shutter for G-Claron 355mm f/9

    Post a WTB ad in the WTB subforum.

  4. #4

    Join Date
    May 2019
    Location
    Stockholm
    Posts
    205

    Re: Finding #3 shutter for G-Claron 355mm f/9

    Quote Originally Posted by karl french View Post
    $300 for decent Copal 3, even if it has a Nikon W 240 in it, is a fair price. Depending on the age of your 355 G Claron it may fit into a Copal 3S.
    It's a late 70-ish, serial number 13385277.
    Seems to be a #3 with M58 and a mounting of 62mm

  5. #5

    Join Date
    May 2019
    Location
    Stockholm
    Posts
    205

    Re: Finding #3 shutter for G-Claron 355mm f/9

    Quote Originally Posted by Dugan View Post
    Post a WTB ad in the WTB subforum.
    Good, thanks. Never thought of this forum as a buy/sell forum

  6. #6

    Join Date
    Aug 2018
    Posts
    193

    Re: Finding #3 shutter for G-Claron 355mm f/9

    Here is one for $248. Only the front cell to sell or give away https://vi.raptor.ebaydesc.com/ws/eB...47&cspheader=1

    Sent fra min SM-G975F via Tapatalk

  7. #7

    Join Date
    Jul 2006
    Location
    Collinsville, CT USA
    Posts
    1,770

    Re: Finding #3 shutter for G-Claron 355mm f/9

    A few years ago I sat down and called some medium to smaller camera stores in NYC. Most are pretty much 100% digital so expect to have to describe to them just what a leaf shutter is. Ended up in acquiring a NOS Copal 3 and a NOS #5 Ilex in their original boxes for under $250 each. Pre Covid 19 I was corresponding with an another photographer in NYC and he told me that there were still a bunch of NOS shutters lying around in backroom storage areas that he knew of. Unfortunately he wouldn't pass on to me which stores he was talking about. About 2 years ago also acquired a like new 300mm Imagon in a Copal No. 3 minus the diffusion discs for under $200.00, "Buy it Now" on eBay. Plan on selling the lens part and repurposing the Copal shutter in the future. Just keep your eyes open and out there... and good luck.

  8. #8

    Join Date
    Dec 1999
    Location
    Forest Grove, Ore.
    Posts
    3,912

    Re: Finding #3 shutter for G-Claron 355mm f/9

    My 355mm G-Claron was originally barrel mounted. Purchased from Kerry Thalmann, he mounted the front and rear elements into a Copal 3 intended for a 210mm lens. I believe this means that, to obtain a given f-stop, I set the aperture to that f-stop on my 355mm G-Claron lens, and then open the aperture by a correction of 1.5 stops. (Actually, 1.52 stops.)

    The calculation for this correction in stops isn't obvious and involves logarithms. The point is, one doesn't necessarily need to have a new aperture scale made, if the shutter you purchased was intended for a different focal length lens.

    My calculation is the following . . .

    Correction in Stops = log[355*355/(210*210]/log(2) = 1.52

    This works for logarithms of any base. So, it works for log10(x), ln(x), etc.
    Last edited by neil poulsen; 10-Apr-2021 at 10:57.

Similar Threads

  1. G Claron 355mm Shutter
    By Smitty in forum Lenses & Lens Accessories
    Replies: 8
    Last Post: 6-May-2019, 18:25
  2. 355mm G-Claron shutter fit?
    By Pete Skerys in forum Lenses & Lens Accessories
    Replies: 15
    Last Post: 23-Mar-2009, 21:57

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
  •