Archived posting to the Leica Users Group, 2000/11/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Kosina claim an angle of view of 110 deg for this lens, does anybody know if this is along the longest edge of the film i.e 36mm or is it the diagonal approx 44mm? Im hopeless at trig, if we assume 110 deg along the longest edge how do I calculate the angle of view for a measured area on the negative? Can I just take a percentage of the linear measurement, thus the short edge (24mm) would be approx 73 deg? I photographed a lunar halo last night with a IIIC and I want to establish whether it was a common 22 degree or an exceptionally rare 46 deg halo! TIA Jason