Archived posting to the Leica Users Group, 1998/01/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]In a message dated 98-01-22 14:59:49 EST, you write: << > How can a lens that is designed to cover a 24x36mm format possibly cover that > format when it is tilted and swung? > Charlie If you think about the cone of light from the back of the lens just filling the frame of film, then imagine the lens farther away as it would be on a bellows, the cone of light gets larger, but of course you lose light according to the inverse square law. donal >> Of course you are correct, Donal. But using the lens at a greater distance means that you are focusing on a very close object. I guess I don't know why anyone would need tilts and swings for such a photograph. Others have commented on the use of the bellows for a 135/150mm enlarging lens. Of course they would cover far more area than needed. Charlie