I've been looking all over for a while now for a simple, but real, visual comparison of film formats vs. the image circle of a couple of really wide lenses. The examples you see in the Wikipedia and elsewhere tend to be hand drawn and assume lenses without inherent distortions (ie. a tree through a 210mm lens on 4x5 film).
Flipping through the Q4 1996 issue of Photo Technique International I spotted exactly what I've been looking for - this advert, by Schneider Kreuznach, has quite an extreme angle of view (some 120 degrees) combined with geometrically dramatic scenery. It really clearly illustrates the whole film diagonal and effective Angle of View relationship (notice the 6x9 vs. the 9x12/4x5 negative outlines) as well providing a canvas for playing with the possible effects of simple shift, rise and fall movements within the resulting huge image circle. As an added bonus it even shows off the vignetting present at the extreme edge of the actual image circle of the demonstrated 47mm f5.6 lens.
I've made one tiny alteration to the original advert - removing the scale reference that was relative to the size it was printed in the magazine. If you want to see the image circle and film sizes in 1:1 scale download a resized portion of the advert (~1.1Mb), print it at 200dpi and, voila!, a true to life version.
Now, go doodle the outline of a standard 35mm negative on the scene (effective size of 36mm x 24mm)... Doesn't it make you want to just run out and buy a large format camera?
:-)
Flipping through the Q4 1996 issue of Photo Technique International I spotted exactly what I've been looking for - this advert, by Schneider Kreuznach, has quite an extreme angle of view (some 120 degrees) combined with geometrically dramatic scenery. It really clearly illustrates the whole film diagonal and effective Angle of View relationship (notice the 6x9 vs. the 9x12/4x5 negative outlines) as well providing a canvas for playing with the possible effects of simple shift, rise and fall movements within the resulting huge image circle. As an added bonus it even shows off the vignetting present at the extreme edge of the actual image circle of the demonstrated 47mm f5.6 lens.
I've made one tiny alteration to the original advert - removing the scale reference that was relative to the size it was printed in the magazine. If you want to see the image circle and film sizes in 1:1 scale download a resized portion of the advert (~1.1Mb), print it at 200dpi and, voila!, a true to life version.
Now, go doodle the outline of a standard 35mm negative on the scene (effective size of 36mm x 24mm)... Doesn't it make you want to just run out and buy a large format camera?
:-)
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