Originally Posted by
Dan Fromm
Anton, here's how to calculate extension (film plan to lens' rear node; for most LF lenses the rear node is very close to the diaphragm) distance given magnification:
extension = focal lenth * (magnification * 1)
If you want to shoot at 10:1 with a 360 mm lens, you'll need 11 * 360 = 3960 mm of magnification. [sarcasm] Go for it! [/sarcasm]
Your best bet is to use a shortish lens. 35/4.5 and 17/4 Tominons, in barrel and intended to screw into the front of a #1 shutter, aren't the best but are quite usable and often not very expensive. If you have money to burn, learn about Zeiss (Oberkochen) Luminars, Carl Zeiss Jena Mikrotars, Nikon MacroNikkors and Leitz Photars.
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