Gregory Fraser <Gregory.Fraser@pwgsc.gc.ca> writes: Has anyone ever experimented with a camera with an off center aperture so that when you stopped down to the smallest opening, instead of the opening being centered behind the lens, it is off to one side? I would imagine the image would be less sharp and I would imagine you would likely have vignetting but would you have the same effect as shifting the lens? Would you be able to even focus such a lens? No, I haven't experimented, cause frankly it doesn't sound particularly interesting. So this is all theory. Well, consider a (simple) lens, with two spherical surfaces. The curvature of the surface is the same at all points of the sphere, so in gross terms there shouldn't be any effect from using other than the middle of the lens. But all the aberrations will be worse, probably much worse. You'll have to do this with a home-made lens, probably. Instructions: http://imaginatorium.org/stuff/chand95.htm Brian Chandler ---------------- geo://Sano.Japan.Planet_3 http://imaginatorium.org/
