According to http://www.ebonycamera.com/cam/main.SW45.html the maximum bellows draw is 190mm.
I presume SW stands for Super Wide, since the camera is described as "An extremely lightweight non-folding view camera, specifically designed for use with wide-angle lenses"
You can use the formula found on Formulas for Bellows Extension.
Given a 150mm lens and 190mm bellows draw, how much magnification can we get ?
M = (B-F) / F
where M = magnification ratio, B = bellows extension, F = focal length
M = (190-150) / 150
M = 40/150
Magnification = 27% or 1:3.75
At closest focus with a 150mm lens, your subject will be 3.75 times the size of the film: roughly 15 x 19 inches. That's just about head and shoulders.
Given a 135mm lens and 190mm bellows draw, how much magnification can we get ?
M = (B-F) / F
where M = magnification ratio, B = bellows extension, F = focal length
M = (190-135) / 135
M = 55/150
Magnification = 37% or 1:2.73
At closest focus with a 135mm lens, your subject will be 2.73 times the size of the film: roughly 11 x 14 inches. That's getting pretty tight, but you're using a slightly wide-angle lens: at that point and the perspective my not be flattering for portraits due to
foreshortening.
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