Nikkor 120 SW f8greenspun.com : LUSENET : Large format photography : One Thread
Has anyone any experience of using a Nikkor 120 SW lens for 8x10? I am aware of the tight coverage but what about fall off at the corners. Is this particularly noticeable? Any other tips would be greatly appreciat
-- Tony McLean (firstname.lastname@example.org), December 15, 1999
You might talk to the folks at www.bostick-sullivan.com; their Hobo 8x10 camera can be configured with the 120 SW....
-- Simon Gammelin (email@example.com), December 15, 1999.
I've used the lens for my 8x10 and light fall off was really noticeable patrticulary when sky was included in the composition.
-- Shigehiro Ishii (firstname.lastname@example.org), December 16, 1999.
Tony, I've seen guys with a 90 XL on an 8x10 using the fall off as an aesthetic element and it looked quite awesome.
-- Dave Anton (email@example.com), December 16, 1999.
The Nikkor-SW series will have light falloff with a dependence on angle theta between lens center and position on the film between cos theta to the power of 3 and cos theta to the power of 4. This falloff is a fairly fundamental property and will not have much, if any, dependence on brand of wide-field lens (as long as the lens actually covers 8x10). If you want to use a 120 mm lens on 8x10 and find the falloff objectionable, the solution is to use a center filter. Nikon doesn't make center filters, but one from another manufacturer (Heliopan, Rodenstock, Schneider) should work. Before buying a center filter, use the lens and see if you need a center filter for the type of photographs you do.
-- Michael Briggs (firstname.lastname@example.org), December 16, 1999.
I use one on 8x10 and light falloff is seldom a problem when I stop down to f/22 or so. Getting too much on the ground glass is more of a problem. Working with so wide a view is interesting & the lens is nice & sharp as well.
-- Dan Smith (email@example.com), December 16, 1999.
Regarding Michael Biggs' comments about light falloff: The cos^4 rule is derived from thin-lens theory, and isn't necessarily a very good predictor of the behavior of real lenses. The Nikkor SW designs in particular seem to "swing" the entrance pupil around a bit, which reduces the light falloff to below what the cos^4 rule would predict. I measure between 1.5 and 2 stops of falloff at the edge of my SW 90/8, whilee cos^4 would predict a bit over 3.
-- Patrick Chase (firstname.lastname@example.org), December 17, 1999.