Auteur: Dan Fromm
Date: 17-12-2004 13:24
Up to 1:1, a good grade of enlarging lens mounted normally (rear to film) will give satisfactory results. Above 1:1, reverse mounted (rear to subject).
I've got good results on 2x3 with a 100/6.3 Reichert Neupolar (slightly better lens than the 100/6.3 Luminar I shot against it) and a 4"/5.6 Wollensak Enlarging Pro Raptar. I also use a 55/2.8 AIS MicroNikkor reversed on 2x3, but note that it does not cover that format at magnifications below 2:1. I mount both lenses in front of a Copal #1 shutter.
I rarely work at such high magnification, but when I go above 5:1 I use a reversed cine objective, a 25/1.9 Cine Ektar II, shot at f/2.8. Inexpensive, not rare, and no worse than my 25/3.5 Luminar is wide open. At higher magnfications, better than the Luminar. In my opinion, from around 4:1 up there is no benefit to stopping down below the lens' optimum aperture. "Real serious" macro lenses, e.g., Luminars, are best wide open.
All that Henri Gaud wrote is correct, but the need for "Stabilité irréprochable" can be reduced by lighting with flash.
Working much above 1:1 is very difficult. If you read English, buy a copy of Lester Lefkowitz' book The Manual of Closeup Photography. It presents the problems and solutions to them very clearly.
Good luck,
Dan
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