Archived posting to the Leica Users Group, 2001/01/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]You are absolutely correct, Doug, that is exactly what I was asking in my own deficient way. Please tell me if I've got it straight. There are the two "normal" cams that look like what one would think of when one hears the word cam...little slopey thingies, for brevity's sake. Then there's the aperture control or diaphragm lever. But the third cam is the stepped "out" section of the metal that surrounds the rear lens element. This arc of metal runs about 1/4 of the circumference, located inboard or radially closer to the center or axis of the lens from the lower or second silver cam, (usually at about 3 to 6 o'clock when looking at the lens from the rear in the normally installed and locked position). Is this correct? Does this cam move something inside the camera body, or is it supposed to move something within the lens itself? Thanks for all the help! Randy On Thu, 11 January 2001, Jim Brick wrote: > > From the rear of the lens, two fixed (they don't move) metal ramp (sloped) > cams, one on each side of the rear element (very prominent, can't miss > them), the third cam is a square metal block (between the two ramp cams) > that when you move it, it opens up the diaphragm. > > Two ramps and a movable square block. > > Jim Jim, I think what you're describing as the 3rd cam is what Randy calls the aperture control lever. As I understand it, Randy wants to know how to determine if the 3rd metering cam is present. Doug Herr Birdman of Sacramento