Guest Ornello Posted March 21, 2012 Share #21 Â Posted March 21, 2012 Advertisement (gone after registration) Leica glass lab which was closed round 1995, developed special glasses that made possible the 1.0 Noct and 75 1.4. The Leica rep showed me a 1" cube of that stuff that was a reject. It weighed like it was solid lead. Â The european EPA later deemed lead could not be used in glass, so substitutes had to be found. Â Â I held that same piece, I bet. They have it at the Leica school. Link to post Share on other sites More sharing options...
Advertisement Posted March 21, 2012 Posted March 21, 2012 Hi Guest Ornello, Take a look here Contrast versus Resolution?. I'm sure you'll find what you were looking for!
DES Posted March 21, 2012 Share #22 Â Posted March 21, 2012 Wow I must be missing something? Link to post Share on other sites More sharing options...
Guest Ornello Posted March 21, 2012 Share #23 Â Posted March 21, 2012 Wow I must be missing something? Â It's a memorable experience. The glass is very dense. Link to post Share on other sites More sharing options...
bill Posted March 21, 2012 Share #24 Â Posted March 21, 2012 I am replying to a specific post there. If the post I am replying to is long, I will trim it. Â Since the post you were "referring to" was immediately above it is un-necessary. Most other people have worked that out. In any event your "response" was a non sequiteur. Â Regards, Â Bill Link to post Share on other sites More sharing options...
Double Negative Posted March 21, 2012 Share #25 Â Posted March 21, 2012 The squashing of lead-containing glass has been the death of many legendary lenses. Another example is the fabled Canon EF 200mm f/1.8L. Â Yes and you can have one or the other or neither. Â There you go, bringing quantum theory into the discussion... Link to post Share on other sites More sharing options...
pico Posted March 21, 2012 Share #26 Â Posted March 21, 2012 The squashing of lead-containing glass has been the death of many legendary lenses. Another example is the fabled Canon EF 200mm f/1.8L. Â Thorium, too, although I don't know if Leica used it. Â What other rare earth elements or compounds have been banned for lenses in Germany, and what effect has it had on Leica lens designs? . Was the Summilux 75mm f/1.4 perhaps discontinued for similar reasons? . Link to post Share on other sites More sharing options...
mjh Posted March 21, 2012 Share #27  Posted March 21, 2012 Advertisement (gone after registration) What other rare earth elements or compounds have been banned for lenses in Germany, and what effect has it had on Leica lens designs? Not just in Germany; RoHS restrictions apply EU-wide. Similar restrictions are in effect in other parts of the world, see Restriction of Hazardous Substances Directive - Wikipedia, the free encyclopedia.  Among the RoHS victims from other vendors are Canon’s 1200 mm lens and the Hasselblad/Fuji XPan, btw. Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.