Emile de Leon said:
Hi Jorge,
320mm Protar V. 450mm Nikon f9/soft corners. 600mm Fuji. There were a couple of 320mm protars on Ebay a couple of weeks ago. One for $360-, one for over $1500- I should have bid on the less expensive one...20x24...sounds great! I've been thinking of converting my Century studio 11x14 to 20x24 for awhile now. Let me know how you like the format.Emile/www.deleon-ulf.com
320mm Protar V will cover, but very soft corners. Same thing with 450mm Nikkor-M, but slightly better performance on the corners. 600mm Fujinon-C covers just a tad better than the 450mm Nikkor-M.
If you don't need wide angle coverage many/most of the process lenses over about 30" will give very good performance. I have a 30" Red Dot Artar that just dazzles on this format, all over the field, and is close to *normal* focal length. But for contact printing any of the process lenses over 30" should give outstanding results.
If you do need wide angle, the best bet would be 16.5" and 19" Dagors, or for that matter any of the old symmetrical lenses of these focal lengths.
Sandy