Re: Compur shutter questions
Most reliable German shutter made by Friedrich Deckel:
I - B - T : Instantaneous - Bulb - Time
M - D - Z: Moment - Dauer - Zeit
Maximum speed depends on the size of the shutter, but for a 15cm lens it could be 1/200 sec.
some sizes of the old Compur:
http://lostlabours.co.uk/photography...s/compur-1.jpg
Here you find info on most different compur and compound shutters:
http://www.tontrennung.de/assets/doc...ur_shutter.pdf
Others could answer your question about Copal - seems they have different measures.
Re: Compur shutter questions
This is a prewar lens with a prewar shutter.
IBT and ZDM is English and German.
Set the dial to Z and activate to view, or a locking remote on B.
Dial to I and shutter will work on the times.
Do show us a picture!
Mine f3.5 is nice and sharp, though a bit more heavy than a modern Copal #0.
Same shutter measurement as my 8x10" 159mm wollensak, so lens elements are mostly in the drawer ;)
Re: Compur shutter questions
Quote:
Originally Posted by
PunkFunkDunk
1. Is the maximum speed 1/200?
If it says so. The smaller Compurs 1/250. They are probably a little slower than that by now, but you can still treat them as they are correct.
Quote:
2. What do the letters B, T, Z, D, M stand for on the dial? Which setting is used for regular use? (assuming B is Bulb and T is Timed exposures).
Yes, B = Bulb, T = Time. M = Moment. (D = Dauer, Z = Zeit in German).
Quote:
3. Does it have preview switch and cocking lever like modern shutters?
You open the shutter on T for focusing, then close it. Then set it to M and cock the shutter, and you are ready. You can set the aperture while focusing or after closing the shutter.
Re: Compur shutter questions
To emphasize- you do not cock the shutter on T.
Re: Compur shutter questions
Quote:
Originally Posted by
j.e.simmons
To emphasize- you do not cock the shutter on T.
True, nor on B.
Many of them have coated paper aperture leaves, so be careful if you try to clean the shutter.
Re: Compur shutter questions
Thank you kindly for the useful information. Here are some pics of the lens I just bought. https://uploads.tapatalk-cdn.com/202...212519b149.jpg
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Re: Compur shutter questions
It looks to be missing a retaining ring or flange for mounting. I’ve bought a number of lenses recently where I forgot to notice whether it has a ring. In those cases, I’ve got a new ring from SK Grimes, but it does add to the cost a bit.
Re: Compur shutter questions
Quote:
Originally Posted by
abruzzi
It looks to be missing a retaining ring or flange for mounting. I’ve bought a number of lenses recently where I forgot to notice whether it has a ring. In those cases, I’ve got a new ring from SK Grimes, but it does add to the cost a bit.
Yes, I had noticed that. I’ll have to wait for the lens to be delivered to me since I don’t know if this particular Compur is equivalent to Copal 0 or 1 size.
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Re: Compur shutter questions
Quote:
Originally Posted by
abruzzi
It looks to be missing a retaining ring or flange for mounting. I’ve bought a number of lenses recently where I forgot to notice whether it has a ring. In those cases, I’ve got a new ring from SK Grimes, but it does add to the cost a bit.
If I read the photo correctly the front cell's side is engraved Xenar 1:3/5 F - 15 CM. If so, the shutter is larger than a #1. Best to wait until you have it in hand, then measure. In the worst case, if you can't find a metric thread gauge, you'll have to send the shutter to skgrimes. Here's a link to their retaining rings and flanges page: https://skgrimes.com/products/mounting-flanges/