Archived posting to the Leica Users Group, 2011/06/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Is the Mk2 different in any way to the Mk 1 ? I think the quote from Dirk's site is marketing speak. AFAIK the only reason the rear group of a Tessar has a cemented doublet is to achieve a refractive characteristic not available in a single glass (and the Leitz anastigmat was a cemented triplet for the same reason). It is therefore really the same as a triplet and could be made with 3 elements as soon as the suitable optical glass becomes available. That is perhaps what Miyazaki has done. As to tantalum glass having "superior refractive qualities" surely this is absurd? Optical glasses all have different refractive and dispersion qualities so some are suitable for some applications and others for others. Absolute superiority is a difficult concept to convince me of in this context. Anyway I have had a Mk 1 since just before Christmas. Apart from quite extreme vignetting wider open than f5.6 it is satisfactory and amusingly tiny. I use mine more on a M8.2 since the vignetting is less intrusive. The coding is so imprecisely done on mine it does not register as being coded. FWIW FD ----- Original Message ---- From: Richard Man <richard at imagecraft.com> To: Leica Users Group <lug at leica-users.org> Sent: Friday, 10 June, 2011 10:51:54 Subject: [Leica] BLOG: How Small is it? The MS Optical 35/3.5 Perar Look, Leica content :-) http://www.5pmlight.com/?p=2320 -- // richard <http://www.imagecraft.com/> // icc blog: <http://imagecraft.com/blog/> // richard's personal photo blog: <http://www.5pmlight.com> [ For technical support on ImageCraft products, please include all previous replies in your msgs. ] _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information