Special Features
Lens no. 6, biocular eyepiece; matl: optical glass (lafn2) per mil-g-174, grade a/b, stain 4, fine anneal, type 744-448 (802199-43); r1, 1.955 radius of lens outside (left) surface; r2, 4.0645 radius of lens inside (right) surface; 0.180 dist between base and inside axis; used in biocular assembly on comm and gun disp
Description
grade b mil-g-174 optical grade a and glass mil-g-174 optical glass material.
Diameter
Between 2.498 inches and 2.500 inches
Axial Thickness
Between 0.3269 inches and 0.3369 inches
Equivalent Focal Length
4.728 inches
Back Focal Length
4.385 inches
Single Lens Style
Meniscus converging
Material
Glass, optical, mil-g-174, grade a and glass, optical, mil-g-174, grade b