I am forming an e-mail list on the subject of binoculars ...

Nov 06, 1997 · 1) Create a new surface, matching the interior (cemented) surface. No change in the lens performance. (This is good, because it shouldn't change!) 2) Create a 0.1mm airspace. This increased the P-V wavefront by 4.5%, from .491 waves to .513, a difference of .022 waves. 3) I then filled this 0.1mm space with indices ranging from 1.333 to 2.0. ................
................