Archived posting to the Leica Users Group, 2009/12/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The 21 Summilux works fine with the M8 and M9 because it a retrofocus design. In both it and the 24 Summilux there are negative elements at the front of the optical group. See: http://us.leica-camera.com/photography/m_system/lenses/5917.html and/or http://us.leica-camera.com/photography/m_system/lenses/5919.html and click on "technical data". In a traditional symmetrical wide-angle design, the nodal point would be much closer to the film or sensor plane than in these lenses. Leica has been doing this with their wides for quite some time. Marty On Sun, Dec 20, 2009 at 11:11 AM, H&ECummer <cummer at netvigator.com> wrote: > >> Date: Sat, 19 Dec 2009 09:29:07 -0800 >> From: "Frank Filippone" <red735i at earthlink.net> >> Subject: Re: [Leica] M9 Internal IR-Cut filter make the camera fragile >> ? ? ? ?to ? ? ?use? >> To: "'Leica Users Group'" <lug at leica-users.org> >> >> The M8 sensor, being smaller, has a less oblique angle on rays from the >> lens >> at its edges of the sensor.....thus it is more forgiving of wide angle >> non-retrofocus lenses.... >> >> OTOH, if you take into account the smaller angle of view, would a 15mm >> Lens >> on the M8 create more or less problems than a 20mm lens on a M9? >> If it were the same design, then the problem seems to be the same or >> close..... if the designs were different, ( which is what I would guess) >> the >> answer would be only a guess. ?You would need to test it to find out. >> >> The answer to the 21 SA on the M9 would be interesting... anyone have a >> lens >> and a M9 to try it out? >> >> Frank Filippone > > Hi Frank, > Just to add to the info pool - I used the 21 Lux on an M9 at the LHSA > meeting in Seattle and the combo worked fine. > Don't know how retro focus the 21 Lux is?? Not at all??? > Cheers > Howard > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >