O P T I C      C L A S S I F I C A T I O N 
Tom  Whitney    256-6234        E-Mail
Size Small Medium Large Giant
Binocular - mm < 50 50-90 90-120 > 120
Spotting Scope - mm < 50 50-80 80-100 > 100
Refractor - in < 4 4-6 6-10 > 10
Reflector - in < 8 8-12 12-25 > 25
Field of View - Deg Small Medium  Large Giant
Binocular < 5 5.5 - 6.5 6.5 - 7.5 > 7.5
Telescope < 3 3 - 4 4 - 5 > 5
Spotting Scope < 5 5 - 6 6 - 7 > 7