Archived posting to the Leica Users Group, 1998/09/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Francois: Which infrared film are you using? If it is the colour slide, I don't believe you have to focus it differently. If it is the B&W infrared, you do have to focus to a different point. I checked my Leica lenses for my R cameras and could not find such a mark. On a non Leica lens, the mark corresponded to just between the right depth of field marks for 4 and 5.6. On other lenses I had used the B&W film with years ago I also remember the R mark near the depth of field mark for F4. I don't know if this is always so, but is a good place to start. Just don't shoot anthing with the lens wide open where you may miss the focus. Regards, Robert At 01:08 PM 9/28/98 EDT, you wrote: >I am referring to the 35mm Summicron Asph. and the Summicron 50mm. Those are >two lenses I would use in the field but mostly the 35mm. >Thanks, > >Francois > > > >