Lens coating to reduce external fogging og scope lenses

5 The lens coating of claim 1, said anti-reflective layer composition being selected from the group consisting of Al2O3, ZrO3, MgF2, SiO2, cryolite, LiF, ThF4, CeF3, PbF2, ZnS, ZnSe, Si, Ge, Te, PbTe, MgO, Y2O3, Sc2O3, SiO, HfO2, ZrO2, CeO2, Nb2O5, Ta2O5 and TiO2.

A lens, said lens presenting a front face and an opposed back face, said lens comprising an anti-reflective layer disposed on at least one of said front face and said back face and a hydrophobic layer disposed on said anti-reflective layer.

A scope presenting a first end and an opposed second end, said scope comprising:

• a first lens, said first lens being located adjacent said first end of said scope and presenting a first face and an opposed second face with at least one of said first and said second faces having a coating, said coating comprising an anti-reflective layer disposed on said face and a hydrophobic layer disposed on said anti-reflective layer wherein said coating permits at least 99% of the light entering said lens second face to be transmitted through said lens first face;
• and
• a plurality of lenses located between said first lens and said second end of said scope, each of said plurality of lenses presenting a first lens surface and an opposed second lens surface, with certain of said lens surfaces containing an anti-reflective layer disposed thereon.