lightweight small huge coverage excellent sharpness and contrast

none really, apart from availability. Import direct via Japan, or if in the US check with Badger, MPEX or similar. f12.5 is fine due to long focal length. Need long enough bellows as it's not a telephoto design.

Well, what a lens. This is the only long LF lens in a copal 1 shutter. ALL other lenses in the >360mm range are mounted in a huge copal 3 or similar monster. It's not just the weight factor though. Optical performance isexcellent; tack-sharp and wonderful contrast, multicoated; coverage is 486mm, which means it's big enough for 11x14" users. I just wish it was more readily available.

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Similar Products Used:

Goerz 480mm f11 Apo-Artar Nikkor M 300mm f9 Rodenstock Apo-Ronar 360mm f9. Although the weight difference is only about 300g, it adds up when backpacking. I'm using it in 4x5" and 5x7" and with the Canham 6x17cm Panorama back on a modified Arca-Swiss 5x7.