Super widefield eyepieces (paired) for EM series stereo microscopes. All have 30.5mm O.D. Choose from the following magnifications:
5x (MA501)
7.5x (MA718)
10x/23 (with 25mm reticle mount)...
Widefield 10x, 15x, or 20x eyepieces, paired. 30.5mm diameter. For use with National Optical models:
400 Series
405 Series
409 Series
410 Series
411 Series
415 Series
416 Series
417 Series
420...