Archived posting to the Leica Users Group, 2015/11/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks. Yes, since IR light mix of wavelengths varies from scene to scene, the exposure will vary for differing filters. But it does help to know the attenuation, even if it for only one set of conditions. Kolari will replace your existing glass cover plate... On a Nikon or Canon, it costs about $350. I have asked them the effective loss of light and was told about a stop. No filter required. Frank Filippone Red735i at verizon.net On Nov 29, 2015, at 11:20 AM, George Lottermoser <george.imagist at icloud.com> wrote: > On Nov 29, 2015, at 7:04 AM, Frank Verizon wrote: > > Excellent work. Very helpful. > I noticed that the 092 filter decreased light by 4.5 stops. What about the > 093 filter? > > I am working from an iPad, where the visual comparison is difficult. Must > wait till we get home to evaluate the visual effects of the different > filters > > http://www.imagist.com/blog/?p=10494 The "unfiltered" exposure = 1/30 seconds. The "092 filtered" exposure = 2 seconds. The "093 filtered" exposure = 6 seconds. Maybe relevant only under these conditions. Regards, George Lottermoser http://www.imagist.com http://www.imagist.com/blog http://www.linkedin.com/in/imagist _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information