Auteur: Dan Fromm
Date: 12-11-2005 13:33
Emmanual Bigler a ecrit "Au-delà, pour les plus longues focales... mais est-ce bien raisonnable, d'imaginer monter un apo-repro de 600 mm sur une chambre 6x9 (çà se saurait si c'était possible ;-);-);-)"
Emmanuel, I have some 6x9 Ektachromes for you that I shot with my 2x3 Graphics and lenses up to 480 mm long. Using lenses longer than 300 mm requires that I use both of my cameras simultaneously, placed front-to-back with a coupling between them. I haven't yet built version 2 of my tandem camera to accomodate my 600 Apo Ronar. I haven't yet found an inexpensive and satisfactory way of supporting and focusing the Apo Ronar. In addition, my 600 AR weighs 3.3 kg, it really is too big and heavy.
Jerome, I don't have the best lenses possible for my 2x3 Graphics, but the lenses I've been able to accumulate are better than the bottoms of bottles. Some even cover 4x5. My travel kit includes 38/4.5 Biogon (doesn't cover 6x9, comes close on 6x7), 47/5.6 SA (single-coated), 65/8 Ilex (much like the 65/8 SA), 80/6.3 WF Ektar (not for 4x5), 101/4.5 Ektar (not for 4x5), 127/4.7 Tominon, 160/5.6 Pro Raptar (Symmar-S, more or less). Most of my longer lenses are process lenses mounted in front of shutter. Apo-Saphirs, Apo-Nikkors, Cookes, ... I was recently given a 58/5.6 Grandagon with separations; I think it will pass acceptance testing. And I recently obtained a 135/5.6 Symmar (Symmar tout court) that will probably pass too.
All that said, I take the majority of my pictures with lenses no longer than normal. There are many adequate or better and not too expensive used lenses in the range 65-100 mm. Shorter than 65 mm begins to get expensive. In my limited experience longer process lenses that will do for 4x5 and 6x9 are neither rare nor impossibly costly.
Cheers,
Dan
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