Archived posting to the Leica Users Group, 1996/12/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 06:31 PM 12/6/96 -0500, you wrote: >Seems like a weak explanation, though. They have a bunch of contacts >there. Leica M seems to communicate the focal length of the lens to >the camera with no contacts. There must be a better explanation. > I assume you mean that M lenses bring up the appropriate frameline when mounted. That communication is done by a mechanical connection. But communicating focal length in the way electronic SLRs do it would be extremely difficult mechanically, to say the least. This is because those SLR's know the focal length of a zoom as it is zoomed--the zoom flash head coupled to this function zooms in and out as you zoom the lens. This is obviously very useful in realizing maximum output from the flash. Charles E. Love, Jr. CEL14@CORNELL.EDU