Page 2 of 2 FirstFirst 12
Results 11 to 19 of 19

Thread: Prontor shutter slow speeds too fast

  1. #11
    Cor's Avatar
    Join Date
    Nov 2006
    Location
    Leiden, The Netherlands
    Posts
    643

    Re: Prontor shutter slow speeds too fast

    Should work (but please get conformation from other people as well). The most important thing is that when swapping shutters that the overall length of the shutter/lens combination DOES NOT change (there is a bit more to it, oa the distance from the inside glass elements to the aperture). The lens threads of a Prontor, Compur or Copal O should be identical AFIK (probably there are exceptions). If Dan Fromm does not respond try to PM him, he is very knowledgeable (as Ian is too..;-)..)

    Good luck,

    Cor

    Quote Originally Posted by bizarrius View Post
    so if i buy a compur shutter the elements will fit? is it that easy?
    anyway the lens is usable 100% if i know which speeds aren't correct. i can compensate my speeds and use bulb until i fix the lens. maybe i'll find a good shutter and change it at some point. the lens is for portraits anyway so i might not use the slower speeds that much (especially when i get a 135mm for landscapes)

    thank you for your time.

  2. #12
    IanG's Avatar
    Join Date
    Jan 2007
    Location
    Aegean (Turkey & UK)
    Posts
    4,122

    Re: Prontor shutter slow speeds too fast

    Quote Originally Posted by Cor View Post
    Should work (but please get conformation from other people as well). The most important thing is that when swapping shutters that the overall length of the shutter/lens combination DOES NOT change (there is a bit more to it, oa the distance from the inside glass elements to the aperture). The lens threads of a Prontor, Compur or Copal O should be identical AFIK (probably there are exceptions). If Dan Fromm does not respond try to PM him, he is very knowledgeable (as Ian is too..;-)..)

    Good luck,

    Cor
    There are quite a few #0 compatible shutters, Copal, Compur (rimset), Prontor SVS & Press Prontpr are the commonest, but there's Proto, Ibsor, Seiko, Epsilon, Trikon, AGI, all the same threads and tube length. I have them all - there may be one or two others like Tempur, Pullen etc. The only variation is one of the Polaroid shutters which has a shorter tube length. That's excluding the specialist shutters I mentioned earlier which are an integral part of some cameras.

    Ian

  3. #13

    Join Date
    Dec 2001
    Location
    NJ
    Posts
    6,494

    Re: Prontor shutter slow speeds too fast

    Cor, most of what I know about shutters' dimensions comes from: http://www.suaudeau.eu/memo/pratique..._centraux.html

    OP, any #0 that has a cable release socket and a T speed or a blade arrestor/open to focus lever should do for you and y'r 203/7.7 Ektar now in Prontor SVS. If you can measure shutter speeds, do what many of us do while taking our time sending a shutter to the shop. Make a calibration table, carry it with the lens and use it.

    Note that press (self-cocking) shutters have the diaphragm closer to the end of the rear tube than do cock-and-shoot shutters. This can be a problem with lenses whose rear cell goes deep into the shutter. Your lens' cells should go into, e.g., a #0 Copal, with no problem. I'd avoid #0 Prontor Press shutters as used in, e.g., microscope cameras because these are dial set (shutter speeds set by a dial on the face of the shutter) and y'r lens' front cell will hit the dial. I have a 203/7.7 Kodak Anastigmat (uncoated early version of your lens), just checked.

    OP, there's a law of nature to the effect that all used shutters' speeds are off. Until proven otherwise, a used shutter needs to be overhauled. Simply getting another old shutter probably won't solve your problem. Think about sending y'r shutter abroad to be overhauled. This page http://www.collection-appareils.fr/g...eparateurs.php has a list of camera repairmen in France. I don't know how well it is maintained. Also ask on the French LF forum www.galerie-photo.info. If I were in Europe I'd check to see whether Gerard Metrot (people on galerie-photo can give you his e-mail) is still active.

  4. #14
    i like pie bizarrius's Avatar
    Join Date
    Mar 2017
    Location
    Cyprus
    Posts
    31

    Re: Prontor shutter slow speeds too fast

    so i opened up the lens, lubbed the speeds and it didn't fix anything, then i fiddled about with the cap and i have the 1 second speed working but not 1/2 and 1/5. everything else is on spot also. something is fishy with this shutter.
    im guessing the cap wont guide the speed governor correctly?

  5. #15
    i like pie bizarrius's Avatar
    Join Date
    Mar 2017
    Location
    Cyprus
    Posts
    31

    Re: Prontor shutter slow speeds too fast

    Hello and sorry for so many messages.

    I found an Anastigmat 89mm on a syncho compur r shutter that is really cheap but everything is working properly. now i know the lens is bad but i can take the shutter if it fits my ektar.
    Does it fit ? what do i look in that chart to know that it fits? should i go for it? i might switch elements and use the bad 89mm lens for fun too. but i want my ektar to have a proper shutter. i love how it performs.

  6. #16
    IanG's Avatar
    Join Date
    Jan 2007
    Location
    Aegean (Turkey & UK)
    Posts
    4,122

    Re: Prontor shutter slow speeds too fast

    The only 89mm Anastigmat I know is the 89mm f6.3 WA which came in a Compur #0 shutter so the right size but the early ones in a Synchro-Compur have a self timer rather than a preview lever. I've just seen one for 299/$375 which is way more than they are worth as they were notoriously poor quality, a friend had one and warned me not to buy one. They usually sell for less than 60.

    Having no aperture preview isn't so important but it's quicker if you have one, later ray 89m WA lenses were in the more modern Compur (last type) with a good preview lever,

    Ian

  7. #17
    i like pie bizarrius's Avatar
    Join Date
    Mar 2017
    Location
    Cyprus
    Posts
    31

    Re: Prontor shutter slow speeds too fast

    Ian i can't thank you enough for your time and knowledge. i owe you alot.

    the lens is this: Click image for larger version. 

Name:	P1015322.jpg 
Views:	6 
Size:	71.1 KB 
ID:	163332
    its only 49 pounds and i've sent a mail asking if everything is working properly and it does. all speeds are fine etc.
    i know the lens is bad. i am just looking on how to make my kodak 203mm a completely usable lens.
    i don't mind the preview lever as my prontor doesn't have one either. i just lock Bulb to focus.

    btw update on my shutter. i've disassembled the speed governor and nothing was fixed so when i screwed it back on i noticed that it went clunkier with more screwing. so i unscrewed the governor half a turn and now it works just fine. all speeds are spot on. even 1/2 1/5 and 1/10. this is really weird. i don't know how much will it last like this but i am only hoping

  8. #18
    IanG's Avatar
    Join Date
    Jan 2007
    Location
    Aegean (Turkey & UK)
    Posts
    4,122

    Re: Prontor shutter slow speeds too fast

    Yes that's the lens I assumed you meant The shutter's fine it's the right size but you will need to make an aperture scale.

    Ian

  9. #19
    i like pie bizarrius's Avatar
    Join Date
    Mar 2017
    Location
    Cyprus
    Posts
    31

    Re: Prontor shutter slow speeds too fast

    aperture scale won't be something since i already have one on my prontor ill just set to each aperture i want measure diameter and copy
    i went to the fields today and took some shots and my speeds were working fine. lets hope it will last. but i will change the shutter at some point. i wanna be confident with my gear. sheet film aint cheap and i can only order from abroad so it also takes some time until i get to it.

Similar Threads

  1. Fixing slow shutter speeds
    By PaulSchneider in forum Lenses & Lens Accessories
    Replies: 7
    Last Post: 6-Jan-2011, 22:06
  2. Dial-Set Compur shutter: adjusting fast speeds?
    By evgenys in forum Lenses & Lens Accessories
    Replies: 9
    Last Post: 23-Dec-2010, 14:49
  3. Copal 0 shutter - implication of bad slow speeds
    By walter23 in forum Lenses & Lens Accessories
    Replies: 5
    Last Post: 28-Dec-2006, 19:31
  4. copal shutter with slow speeds at 1/400 and 1/250
    By jerry brodkey in forum Cameras & Camera Accessories
    Replies: 5
    Last Post: 5-Apr-2002, 09:40
  5. Slow Speeds on a Compound Shutter
    By sheldon hambrick in forum Lenses & Lens Accessories
    Replies: 2
    Last Post: 10-Apr-2000, 05:24

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
  •