Long Working Distance Flat field Achromatic Objective Lens for Metallurgical Microscope

Connecting thread: international standard interface "4/5 inch * 1/36 inch", diameter M20*0.705MM

The external thread diameter is 20mm, the pitch is 0.705mm.

100X Dry means not working with Oil  but in dry state.

Magnification	NA	WD(mm)
PLL 5X	0.12	18.3
PLL 10X	0.25	8.8
PLL 20X	0.4	8.6
PLL 40X	0.6	3.7
PLL 50X	0.7	2.02
PLL 60X	0.75	1.34
PLL 80X	0.8	0.96
PL 100X OIL	0.85	0.85
PL 100X Dry	1.25	0.44