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I'm after the name of a method I've seen for using extreme wide angle lenses, so that I can find out more about it. I found it a couple of years ago and then promptly forgot.
It uses a normal lens mounted in reverse on the camera body, with the wide angle mounted normally in front. The two lenses are therefore base-to-base in relation to each other. This is not the usual macro method of mounting a single lens in reverse on the camera.
The outermost lens projects its image onto where the film plane should be, which (with care) coincides with the film plane of the lens mounted in reverse ont he camera body. This lens then projects the virtual image onto the film or sensor.
It's a method for using extreme wide angle lenses - like 3-6mm - without needing a clever design with a large back focus to clear the mirror in the camera body. The other advantage is that it places the wide angle lens well out from the camera, giving you space to get in close without your shadow falling in shot.
My memory says I saw it being used on video or film motion-camera bodies and it had a special name, like the 'xxxx' method or technique.
Any ideas?
(and by the way, I've tried it and it works)
Ta.