Archived posting to the Leica Users Group, 1999/03/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I'm not sure when they started using the series system but I would presume that the advantage is in the manufacturing process and storage space. No screw threads to cut, just a simple ring around the glass. Less deep filters (without the threads) equals more filters in the same space (inside your bag). I've an old (late) 35 Summilux which takes S7 filters in the hood (seperable) don't forget that 48mm filters work in this as well, a favourite Canon and Leitz size. Perhaps the wierdest arrangement is for my 50mm Summilux, I couldn't find a reasonable (cheap) 43mm filter but was able to buy a (Japanese) 43mm->S6 ring, a Leitz S6 filter and a Leitz S6 retaining ring all for 3 GBP! You can't get the lens hood over it though! Jem > -----Original Message----- > From: Jim Bauman [SMTP:jbauman@earthlink.net] > > Hi all, > > What's the reasoning behind the "Series" filters... you know, > the kind that are unthreaded and are held in with a retaining ring? > Leica bought into that scheme with the 135mm Elmarit-M. > > Thanks, > > Jim Bauman > > > >