PLANO-CONC. LENS; N-BK 7; D=22.4
PLANO-CONVEX LENS; FUSED SILICA;
BICONVEXL.; N-BK 7; D=31.5; F=10
BICONVEXL.; N-BK 7; D=31.5; F=50
NEUTRAL FILTER; T=20%; D=22.4; M
BICONVEXL.; N-BK 7; D=31.5; F=70
