Leitz has not been very good at coatings - so this is wishful thinking by the Leica lovers. All the best! Raimo K Personal photography homepage at: http:\\www.uusikaupunki.fi/~raikorho
----- Original Message ----- From: "Andre Langevin" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, March 25, 2004 8:42 PM Subject: Re: Looking for a 120 carry-around camera > >Multi-layer coatings were developed much later, jointly by Zeiss and Pentax. > >SMC Takumar lenses were introduced in 1971... > > > >Raimo K > > > >> It struck me, Sven - maybe you are thinking of multilayer coating > >techniques, which indeed I believe were developed during WWII-time? > >> > > > Lasse > > You may refer to the fact that some exotic lenses for scientific > purposes could indeed be provided with more than one coat long before > SMC appeared. But this was a very expensive process and was not > applicable to consumer optics. I've seen a mention on the Leica User > Group that some pre-70s Leitz optics could also have had one or a few > elements coated with more than one coat, but I've not find enough > information to say if this seemed speculation or proven fact. > > What Asahi did is to resolve the question of the feasability of > multi-coating consumer lenses. They gave it to the masses. (Well, > we're talking about the middle-class in rich countries and the > upper-class, small but found everywhere, but I'm slipping off-topic.) > > By the way, some Pentax 6X7 lenses were multi-coated before the > official introduction of SMC. Also some multiple coating (if > multiple means 2 or more) has been around for quite a while at > Minolta where it was called Achromatic Coating and available on some > lenses since 1958. But this was roughly multi-coating as it implied > 2 different thickness of the same type of coating, at the beginning > at least. > > Andre >
