Archived posting to the Leica Users Group, 1998/06/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]In a message dated 6/8/98 5:13:23 AM, tom shea wrote: <<The largest "chunk" of glass in the 35 1.4 not so large at all. It is apparent that you have not seen one of these puppies. It really is not very large at all. Go to a dealer and try one. You may be surprised. >> not to mention other abuse about defending summiluxes, fast lenses and who knows what eles. thanks tom, nothing like a little abuse to start the week right. - -- when I say "hunk" of glass I don't mean it weighs a lot. I mean it is very large relative to the focal length. A 1.4 lens is a LOT bigger than an f-2, and it is this simple size, the distance of the edge of the lens from the axis of the lens (a line through its middle from front element to film) that causes all the trouble. The bigger the lens elements, the more they have to bend the light to move it through from object to film. The more you do that, the more you get the different wave lengths separated (I learned this in High School Physics) which is why prisms and rainbows work. An f-3.5 lens is relatively undemanding in this regard, and so it was easy to make them of very high quality, while the early 1.4 lenses were downright poopy. I seriously dought that Leitz will be making a 3.5 Asph/APO 50 mm Elmar any time soon because there would be no point -- the existing 3.5 (or 2.8) Elmar does a fine job as it is. - -- An f-2 lens IS fast. It's only one stop slower than the 1.4. Unless you are going to, very often, be in situations where you need that speed and cannot compensate by using faster film, I insist it is a luxury you need not pay a lot of money for. - --I submit that people who buy 1.4 lenses that they don't need are trying to impress someone -- themselves, if no one else. I say this freely admitting that I sure as hell hope someone is impressed when they see me with a Leica around my neck. If the guy who asked the question really really needs the faster lens, fine, but if he doesn't he should save money. speaking of saving money -- if anyone with an M-3 out there is considering buying one of those quick load adaptors that Leitz made for it, send me $15 and I'll send you mine -- it doesn't work worth a damn, but I'll be happy to sell it to you anyway. I've tried just sliding the film in, crimping the edges, even pondered gluing the film end to the take-up spool but it refuses to catch 9 times out of 10. charlie trentelman ogden, utah