> > Now if they are IMAGING a 4" object.....that is amazing. > > Ron Lee > > Check out http://www.plk.af.mil/PLhome/PA/FACTSHEETS/eleoptcl.html. CAPABILITIES Telescope 3.67-meter thin meniscus primary mirror Satellite tracking (17 degees/minute) Replaceable secondary mirror for alternative applications Field of View is 1 milliradian on telescope, 300 micro radian in coude' labs Adaptive optics Compensated imaging in all coude' labs -10 centimeter resolution for 400 kilometer satellite So they are imaging with a resolution of 4 inches, albeit at ~200 nmi or 250 statute miles. Stu Huston