Archived posting to the Leica Users Group, 2001/06/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]on 25/6/01 3:32 PM, Doug Herr at telyt@earthlink.net wrote: > On Mon, 25 June 2001, lea wrote: > >> >> What are "cams" relative to the R system, what do they do, why are they >> important and does their presence or lack thereof mean certain lenses >> can't be used with certain bodies? >> >> Do cams only show up in the R system? >> >> -- >> Lea Murphy >> Whiny Dog Press >> 816-333-9111 >> > > Lea, > > The cams are the lens' communication with an R body's metering system. For > the most part a lack of a cam meant the body will not meter correctly with the > lens. One of the major exceptions is any ROM lens cannot be used on any > Leicaflex body: > > ) a 1-cam lens is for the original Leicaflex > > ) 2-cam is for Leicaflex, Leicaflex SL and Leicaflex SL2 with a couple of > exceptions, explained below. > > ) 3-cam lenses works on any Leica reflex body, Leicaflex or R, with the > exceptions explained below. > > ) 3rd-cam lenses have only the R-series meter cam and will meter only on these > bodies, but may fit on a Leicaflex. (same exceptions, below). Some people > don't know the distinction between 3rd-cam and 3-cam. A 3rd-cam lens lacks > the metering cams for Leicaflexes. > > 4) ROM lenses are for R bodies only. They have the 3rd cam and also an > electronic contact strip that is used for some of the R8's functions. > > The exceptions: some lenses, for example the 24mm Elmarit-R, the 16mm > Fisheye, and the old 80-200 f.4.5 Vario, require more clearance between the > mirror and the back of the lens than a Leicaflex or Leicaflex SL has. If not > a ROM lens, these can be used on a Leicaflex SL2 but not on the earlier > Leicaflexes. > > HTH > > > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com > ___________________________________________________ > The ALL NEW CS2000 from CompuServe > Better! Faster! More Powerful! > 250 FREE hours! Sign-on Now! > http://www.compuserve.com/trycsrv/cs2000/webmail/ > > > > This was the first time I have ever heard so clear explanation. Thanks Doug CamMan Herr Pablo