rec.photo.darkroom

Subject: Gossen Lab (enlarger) attachment

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For your records in case someone buys a Gossen Lab attachment without
an instruction manual, this is how I've been using it. This was a
response I left on a message board:

This may be a little late and everyone may have already moved onto
digital, but here's how I've been using it for the past 20 years
(learned it without a manual so it could be all wrong, but it works).

Find the ISO (ASA) of the paper you're using. Set your meter to that.
With a negative open your lens to the widest aperture (f/2.8 or f/4.0
or f/5.6). Meter on the darkest part of the negative (usually the
highlight in the print). Take that meter reading set your enlarger
aperture.

For a slide do the reverse. Close your lens to the smallest aperture
(f/16 or f/22 or f/32). Meter on the lightest part of the slide. Take
the meter reading and set your enlarger aperture.

There will be times when nothing works and a good ol' test strip will
have to do. However, once you find the exposure you can set your Gossen
Luna Pro with it.

There will be a lot of times when you need to move the compensation
(EV) ring to make the exposure work.


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