Illuminated Microscope with Inch Scale

Flat field quality optics without chromatic or spherical aberration. Measuring teticle is removable and is provided in the lens for microscopic measuring operations. Field diameter at 20x is 9/32inches with a 15/16 inch working distance. At 40x the field diameter is 9/64 inches with a working distance of 25/32nd inch. Reticle scale is 0-50. Reticle increments at 20x is .004 inch; at 40x is .002 inch.