Arrangement for rotatable adjustment of a cap on an eyepiece...

Barrier member for a telescope

Binocular cover

Binocular lens protector

Blooming protection for a nightsight

Lens cap applicable to a video camera

Lens cap retention arrangement

Lens cover apparatus of optical instrument

Lens cover for an optical sight

Lens protection for medical purposes

Means and method to prevent liquids and flying debris from...

Mirror cover

Protection system and technique for electro-optical systems

Protective window assembly and method of using the same for a la

Protective window assembly and method of using the same for...

Space optics cover and extendable baffle for contamination...

Stereomicroscope having a closing member for protecting lenses

Telescope provided with automatically opening and closing cover