Today when I was using my older model 108 Devere enlarger with the
8x10 mask in it, I noticed that the image was visibly moving around
on the easel! Yikes! This enlarger has a big fan on it because the
lights get so hot. Previously, when using the smaller masks (4x5,
6x6cm) vibration hasn't been a problem. I went all around the
enlarger looking for sources of the vibration. The head itself
vibrates quite a lot, but again, this has never caused visible
vibration on the paper with the smaller masks. I tied up the duct
hose going from the head so that it doesn't touch anything, but the
vibration is still barely visible.
Strangely, the prints don't look fuzzy to the naked eye. But they
MUST be affected by this, right? I was thinking of trying to enlarge some
8x10 negatives, but given how much the image shook when I put a medium
format strip in that holder, I wonder if I should even try. (I don't have
a
lens mounted in a lensboard yet for 8x10 negs.)
My only idea about why the 8x10 glass carrier vibrates so much more
than the others is that the others have a sort of hole, like a finger
hole,
and maybe the air can pass through that hole, whereas with the 8x10 holder
there is no hole, so the fan just sucks on the glass and the resistance
causes some vibration. (Oops, Eudora doesn't like that word "sucks."
I'll
probably get some red peppers next to this message. But seriously, bad
vibrations suck! Yes, indeed, I have two hot peppers!)
Any suggestions?
--shannon
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Ken Hough Photographic Repair Service
Specializing in the Complete restoration of
Deardorff View Cameras
Est 1982
www.deardorffcameras.0catch.com
219 462 0281
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