Hello!
I try to enlarge 4x5 color negative films to 50" roll paper. The magnification ratio is about 11x. I usually use a normal Rodagon 150mm and a Componon-S 135mm for enlarging up to 20x24", but I think they don't fit to high magnification use. So I can't decide to choose between the Rodagon-G 150mm and the Apo-Rodagon-N 150mm (or the APO-Componon HM 150mm).
Because my negatives are thin, and my enlarger LPL C7453 is bright enough, perhaps I don't need F4 aperture for focusing. Moreover, I probably can get a used Rodagon-G 150mm from a camera shop easily. Should I select the Rodagon-G? But the magnification range of the Rodagon-G 150mm is 10x-40x, while the range of the Apo-Rodagon-N 150mm is 2x-15x. 11x may be too small for the Rodagon-G. And, the Apo-Rodagon-N's flatness of field allows to open 1/2 or one stop, this may be helpful to reduce the long exposure time of the big print. Should I wait until I find a used Apo-Rodagon? Or the non-Apo Rodagon is sufficient for this purpose? Which lens is better for the 50" roll print?
Thanks to all. (I'm sorry if my English writing is incorrect.)
Masa Hirai (Tokyo, Japan)
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