Archived posting to the Leica Users Group, 1999/12/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Erwin Puts wrote: > > The extremely high quality of this lens is not degraded by the > permanently attached protective filter in front of the lens and will > fuel the discussion of the use of filters. > Surely in this case, the permanently mounted protective filter is figured into the lens design? I'm not an optical expert by any means, but I would expect that if you attach a permanent filter, or a filter that is expected to be in place unless others are used, will have been figured into the lens equations. A filter which is added to a lens without any such permanently attached filter has not been figured into the lens design. Surely this would account for the absence of loss of quality? Am I wrong? M. - -- Martin Howard | Visiting Scholar, CSEL, OSU | What boots up must come down. email: howard.390@osu.edu | www: http://mvhoward.i.am/ +---------------------------------------