Caption: People On Sun Beam Path
Artist: Steve Kropp
Release: Not Applicable
File Size: 37.80 MB

Caption: Road With Blurred View
Artist: Alan Giana
Release: Not Applicable
File Size: 9.99 MB

Caption: Illustration of a Cassegrain reflector
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 16.17 MB

Caption: The Gregorian telescope uses two concave mirrors to focus images in a short telescope tube
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 16.17 MB

Caption: USA Flag Lighthouse
Artist: Charles Waller
Release: Not Applicable
File Size: 5.93 MB