Archived posting to the Leica Users Group, 2010/04/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The floating element contributes seriously to fixing the focus shift while maintaining the correction of aberrations out to the edges of the field seen in the previous design. Sharpness throughout the range in near-far compositions is much improved. I've seen the new design and it's definitely a measureable improvement. There's only ever a "best" for "now". Marty On Sat, Apr 24, 2010 at 10:20 PM, Geoff Hopkinson <hopsternew at gmail.com> wrote: > Dante, I've never shot the current Summilux 35 ASPH. and can't comment on > it > from any personal experience. It has been reported as having some > identifiable focus shift in the most critical cases (from article in LFI). > Peter Karbe has recently said that the lenses are optimised for best > performance at infinity. I understood the floating element arrangement to > assist in the close in performance and reduce focus shift. That is my > experience with the 50 Summilux ASPH. and the APO 75 Summicron ASPH. at > least. That is to say I get very consistent and accurate focus in the 1 to > 3m range where I shoot them most and have never identified any focus shift > (down to ~f/4). > I ordered the lens (at least I have my name down and they will accept my > deposit when it is actually officially announced). I'll let you know, > probably months hence. It will take months to find the dollars anyway ;-) I > may sell my children for medical experiments. > > f/1.4 and be there > Geoff > http://www.pbase.com/hoppyman > > > On 24 April 2010 22:26, Dante Stella <dstella1 at ameritech.net> wrote: > >> The floating element is designed to promote consistently good focus along >> a >> distance range, which in the Nikon world made lenses that shot well at a >> distance shoot well close-up (since a lens can really only be optimized >> for >> one distance/repro ratio if the elements move as a unit). >> >> But since the current Summilux ASPH already seems to shoot better close-up >> than at a distance, is the floating element designed to fix the >> long-distance end? >> >> Dante >> >> On Apr 22, 2010, at 9:06 AM, Leonard Taupier wrote: >> >> > Actually Nikon introduced the floating element in the 24mm in 1967, >> > their >> first. Mine is a 1972 model which I had converted to AI in 1980 or so. I >> still have that lens plus the AF version. I have most of the Nikon MF >> lenses >> which were given new life with the release of the D700. >> > >> > I also have the 35mm Summilux ASPH which I plan to keep. >> > >> > Len >> > >> > >> > On Apr 22, 2010, at 1:53 AM, Chris Crawford wrote: >> > >> >> Floating elements are not new. My old Nikon 24mm f2.8D AF-Nikkor has >> them. >> >> So does my Olympus OM 85mm f2 and 50mm f2 Macro. The Olympus lenses are >> >> 25-30 yrs old and the Nikkor is 16. >> >> >> >> >> >> -- >> >> Chris Crawford >> >> Fine Art Photography >> >> Fort Wayne, Indiana >> >> 260-424-0897 >> >> >> >> http://www.chriscrawfordphoto.com ?My portfolio >> >> >> >> http://blog.chriscrawfordphoto.com ?My latest work! >> >> >> >> >> >> >> >> On 4/22/10 1:18 AM, "Frank Filippone" <red735i at earthlink.net> wrote: >> >> >> >>> 2 things to note..... first, New Leica lenses cost $5K+ >> >>> Second, it is no longer sufficient to have ASPH elements.... they must >> be >> >>> FLOATING ...... >> >>> >> >>> Floating is the new Leica Buzzword.... >> >>> >> >>> ( yes, I understand the issue of back focus.....) >> >>> >> >>> Frank Filippone >> >>> red735i at earthlink.net >> >>> >> >>> Another new toy to consider: >> >>> >> >>> >> http://leica-camera.com.ua/assets/Info_09_2010_LEICA_SUMMILUX-M_1.4_35mm_ASP >> >>> H._Engl.pdf >> >>> >> >>> >> >>> Product code: 11663 >> >>> >> >>> Approx. US$5,000. >> >>> >> >>> >> >>> >> >>> >> >>> _______________________________________________ >> >>> 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 >> > >> > >> > _______________________________________________ >> > 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 >> > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >