lens board aperture

greenspun.com : LUSENET : Large format photography : One Thread

I have just purchased a super angulon 90mm f8 in compur shutter circa 1961. My current lensboard for the angulon 90mm f6.8 is copal 0 and doesn't fit. I'm presuming I need an 00 fitting but cambo don't list one for the cambo explore/cadet. So I'm going to bite the bullet and get one made, but what is the aperture size that I need? Any help , as always, is much appreciated.

-- dave bulmer (dave.bulmer@bl.uk), November 17, 2000


Dave: Just take the ring off that locks the lens to the board and mark around the inside of it. Draw a line from corner to corner to find the exact center. Nothing to it. If you send it out to be drilled, let them take the measurements. It won't hurt if its a few thousands too big, and you can file it out a little if too small.



-- Doug Paramore (dougmary@alaweb.com), November 17, 2000.

you might try drilling holes in pieces of board until you find the right drill bit. then just drill a blank lens board. at least that is what I would do. Just curious does the shutter have B & T ?-J

-- josh (devil_music@usa.net), November 17, 2000.

thanks for the help. What's B & T by the way?

-- dave bulmer (dave.bulmer@bl.uk), November 17, 2000.

"What's B & T by the way?"

Bulb & Time settings.

-- sheldon hambrick (sheldon_hambrick@hotmail.com), November 17, 2000.

Thanks, I'll check when I get home.

-- dave bulmer (dave.bulmer@bl.uk), November 17, 2000.

Contact Calumet. They may have a lensboard with the right hole diameter or drill one for you. On the other hand, they custom drilled a lensboard for me for $10 or $15 when I purchased a new lensboard, which is cheap considering if you ruin the board you have to buy a new one. If they ruin it, they have to eat the cost.

-- Charlie Strack (charlie_strack@sti.com), November 17, 2000.

According to my calipers, you need a 1.050" hole for the locking ring on a No. 00 shutter (or at least for the Synchro-Compur shutter on my 58mm Grandagon). If you don't have a drill press, though, I'd have a dealer or machine shop drill the hole as it's easy to screw things up with a hand drill.

-- Jeffrey Goggin (audidudi@mindspring.com), November 17, 2000.

Thanks for the advice. I contacted my local machine shop who took one look and said , easy, 2.00 ($3.00),if the boss doesn't see, so that's me set up for the weekend. All I have to do now is "paint it black" as an aging rocker once said.

-- dave bulmer (bowlocks@aol.com), November 18, 2000.

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