Archived posting to the Leica Users Group, 2006/10/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]What it means is that to have a lens that works "properly" (whatever that may mean in reality) you will have to use a Leica M lens in the future; so no Zeiss, no CV, no LTMs with M-adapters, no Russians (mixed blessing!), etc. Or rather put it another way there isn't enough space in 6 bits to encode all the possible lenses that you can mount on your M. So: (a) if the coding really makes any difference you are stuffed; (b) if it doesn't why are Leica bothering - except to make a few bucks Oh... Peter Dzwig PS Now, about getting my screw-to-M adapters engraved.... Dave Mason wrote: > I am certainly not claiming that they are deceitful - or that the > person who posted info earlier is - I just don't understand it. I > would take the 6 bit/64 lenses idea if one of the lenses that they > won't put the coding on wasn't an earlier (e.g., mid-1980s) Summicron > 50. In terms of Exif data a "Summicron 50mm f/2.0" is a "Summicron > 50mm f/2.0" is a "Summicron 50mm f/2.0".... isn't it? > > > Dave > > Brian Reid <reid@mejac.palo-alto.ca.us> writes: > > >>>I'm just curious why Leica claims not >>>to be able to put the coding on older lenses if its just to put a text >>>string in the EXIF data. It doesn't make any sense. >> >>I start with the assumption that Leica is not being deceitful. >>You can call them a lot of things, but manipulative and deceitful is not >>one of them. >>I have to assume that they have a reason to do this. >> >>Here's what I think. A 6-bit code can identify no more than 64 different >>lenses. I'd be willing to bed that since the release of the M3 50 years >>ago, Leica has issued maybe 50 different kinds of lenses. If they were >>willing to put 6-bit codes on all of them, they'd only have room for a >>dozen new lenses and then the code would be full. >> >>So I think if I were them, I'd pick about 20 to 30 of the more modern >>lenses and assign them code numbers, and reserve the remaining 30 to 40 >>numbers for products that they haven't shipped yet. >> >> >> >>_______________________________________________ >>Leica Users Group. >>See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >