Archived posting to the Leica Users Group, 2011/06/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Remember that the original was written in Japanese :-) My take is that the Tantalum glass is superior to whatever they were using in 1800s, and therefore it can compete competently with a Tessar, There is a list of difference between the original and the MKII, but none substantial. The optical elements are the same. On Fri, Jun 10, 2011 at 5:47 AM, FRANK DERNIE <frank.dernie at btinternet.com>wrote: > 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- // 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. ]