Bioptic telescope system embedded into a spectacle lens
Bioptic telescope system for use with bifocal spectacle
Bottle telescope
Branch image pickup and view system
Brightness intensifier tube with alignment marker
Building with roof mounted periscope
Can telescope
Carriage for optical elements in an optical sighting device
Carriage for optical elements in an optical sighting device
Case for holding a binocular
Catadioptric optical system
Channel selector for multiple channel sight
Clip-on optical mounting structure
Close-up attachment lens for a binocular
Coarse and fine drives for a monocular
Collapsible binocular
Collapsible field glasses
Collapsible viewing instrument
Collimator/diopter assembly with folder optics for a night visio
Combat vehicle with a hatchway in its armored roof and including