Total magnifications ......................40X-1600X Eyepiece ................................................WF10 IOS infinity-corrected achromatic objectives ........... 4X/0.10 10X/0.25 40X/0.65 100X/1.25 (Oil) Condenser ............................................NA1.25 Coaxial coarse and fine focusing adjustment knobs Base ...Built in 6V 20W halogen bulb with adjustable brightness Note: IOS= Infinity-corrected optical system Optional accessories 1) Eyepieces ...WF16X WF 10X (pointer) WF10X (article) 2) Photo eyepieces ................................S2.5 S4 3) Simple polarizer attachment .......Polarizer slide ....................................................Analyzer slide 4) Dark field attachment .......Dark field condenser 5) Phase contrast attachment 6) 35mm photo attachment 7) C-Mount and CCD camera