Trial Lens Set

reduced aperture, 225 lens, contents:- 32 pairs each cx and cc sph              20 pairs each cx and cc cyl 0.25 to 4.00 in 0.25 steps                 0.25 to 3.50 in 0.25 steps 4.50 to 6.00 in 0.50 steps                 4.00 to 6.00 in 0.50 steps 7.00 to 14.00 in 1.00 steps                10 prisms 16.00 to 20.00 in 2.00 steps              1/2,1,2,3,4,5,6,8,10,12 accessories: maddox rod, stenopaic slit, pinhole 2 blank discs, red glass, green glass, trial frame ..