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.
NSN 5915-00-156-2083
NSN 5935-01-549-3830
NSN 2925-01-206-7948
NSN 5998-00-282-2097
NSN 5990-00-435-1933
NSN 6650-01-181-6037
NSN 6320-01-554-0901
NSN 5895-01-042-9860
NSN 5965-01-264-1738
NSN 5985-01-235-0958
NSN 5935-01-067-7529
NSN 5910-01-287-9780