Archived posting to the Leica Users Group, 2004/11/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]My old 280 f2.8 showed 3.4 when wide open on my R8. I had a ROM fitted when it was serviced, not it reads 2.8 as expected. I got the impression from Leica GB this is common with long lenses. Frank On 3 Nov, 2004, at 19:32, animal wrote: > > >> For Simon, the apo extender-R 1.4 can, indeed, be used on several >> other >> Leica-R lenses, according to Sartorius in his "Indentifying Leica >> Lenses.'' >> He says that while the extender was "designed for specific use" with >> the >> Apo-Tely- R 280/2.8 to transform it into a 400mm/f4 Leica "does >> guarantee >> excellent results'' with following other Leica-R lenses: the >> Macro-Elmar R >> 100mm/f4, the Elmar-R 180mm/f.2.8, the Telyt-R 400m/f6.8 and the >> Telyt-R >> 800mm/f6.3. The 800mm, Sartorius notes, would be transformed into a >> 1120mm/f8.8. >> He also says that Leica's illustrated brochures guarantee that if >> the >> extender is used with the Apo lenses, there would be "absolutely no >> loss in their >> extraordinary optical performance.'' -- bob cole >> > > Thanks for all your replies. > I tried it carefully today with my 180 f2.0 and it fits without > hitting anything. > Strangely though the aperture shown in the viewfinder is now 3.4 . > I expected 2.8.Now that i,m at last developping my own film i,ll do a > ring around test and will check the true aperture of the combo as > well. > best regards,simon jessurun > amsterdam,the netherlands > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >