[pure-silver] Re: Threading Enlarger Lenses
- From: Jim Brick <jim@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 7 Feb 2008 08:34:56 -0800
On Feb 7, 2008, at 12:10 AM, Snoopy wrote:
Dear Jim,
Jim Brick wrote:
Another way (if the plate that you are screwing in to is thin
enough) is to screw the lens down until it stops, then back it up
until the numbers face the front, then put an enlarger lens 'jam
nut' on the back to lock it in place.
Yes, but that would be really difficult to keep in alingment ? After
all the jam nut exerts pressure the ther way and hence the lens
won't sit straight if the rear side of the mount is uneven ?
Actually, an uneven rear would not cause the lens to sit 'not
straight' as the lens is held straight by the threads. One doesn't
actually 'crank down' on a jam nut. One simply snugs it down to hold
the lens in the proper orientation.
I've had Durst, Omega, Beseler, Federal, Leica, and ZBE enlargers.
Only the Durst and Leica were threaded. All of the others were simply
clean holes and the lens was held in with a jam nut.
:-)
Jim
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