One needs a larger format than one's system in order to be able to tilt the lens, otherwise it won't cover the film area/sensor.
I'm at a loss on how to properly explain it (not being a native speaker and all), but compare the lens with a flashlight that projects a cone-shaped beam of light. If the cone is not large enough, one can't tilt the lens enough to get the desired effect.
Other than that, I might point out that a not that more expensive route for attaching the contraption to a dSLR/whatnot is to use a "proper" male mount (from a scrapped lens, extension tube, teleconverter whatnot) instead of a body cap or such as one can then lock it to the camera body. I used an old Nikon pre-Ai extension tube, got an ancient single coated UV filter, removed the glass and glued the filter frame/ring to the lens mount.
Thus I could attach a clear UV filter for dustproofing the dSLR or some kind of effect filter, colour filter for B&W photography etc.
One needs a larger format than one's system in order to be able to tilt the lens, otherwise it won't cover the film area/sensor.
I'm at a loss on how to properly explain it (not being a native speaker and all), but compare the lens with a flashlight that projects a cone-shaped beam of light. If the cone is not large enough, one can't tilt the lens enough to get the desired effect.
Other than that, I might point out that a not that more expensive route for attaching the contraption to a dSLR/whatnot is to use a "proper" male mount (from a scrapped lens, extension tube, teleconverter whatnot) instead of a body cap or such as one can then lock it to the camera body. I used an old Nikon pre-Ai extension tube, got an ancient single coated UV filter, removed the glass and glued the filter frame/ring to the lens mount.
Thus I could attach a clear UV filter for dustproofing the dSLR or some kind of effect filter, colour filter for B&W photography etc.
Scoo