Patent ID: 7403331

Claim:
A telescope comprising: (a) a flat mirror with a small central aperture, (b) a concave mirror the focal point of which nearly coincides with said flat mirror central aperture on a common axis and facing said flat mirror on the front/reflective side with said flat mirror at an angle such that images reflected by said flat mirror shall strike said concave mirrors reflective surface, (c) a lens means located on the back side of said flat mirror with its front focal point on a common axis with said concave mirror and said flat mirror aperture, (d) with said lens means back focal point on a common axis with a viewing lens system, (e) where said lens means inverts and repositions said concave mirror focal image to a position behind said flat mirror at said lens means back focal point, (f) where movement of said lens means with respect to said concave mirror increases or decreases image size observed with said viewing lens system.