An optical system consisting of two or more lenses secured within a cylindrical sleeve. It is the component of an optical instrument nearest the eye of the observer when sighting. The distance between lenses is maintained by an optical element spacer. It usually has focusing facilities and may include a reticle, filter, and/or diopter scale.
Classification: Military equipments not identified by kind
NSN 5950-00-776-7003
NSN 5975-00-345-8055
NSN 6645-01-113-6712
NSN 5930-00-181-5885
NSN 6620-01-469-9006
NSN 6150-00-297-3928
NSN 7035-01-355-7284
NSN 4140-01-275-8821
NSN 5935-01-152-2677
NSN 5855-01-422-8060
NSN 5985-01-419-6178
NSN 6150-00-721-3945