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
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
You might talk to the folks at www.bostick-sullivan.com; their Hobo 8x10 camera can be configured with the 120 SW....
Hi, Tony
I've used the lens for my 8x10 and light fall off was really noticeable patrticulary when sky was included in the composition.
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.
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.
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
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