Base for microscope
Base for microscope
Baseball-type binoculars
Basketball-type binoculars
Battery housing of rifle scope or similar article
Beam splitting adjustable C-mount optical coupler
Beam splitting adjustable optical coupler
Bifocal magnifier
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular
Binocular