Eyepieces – 10X WF. Coaxial Coarse & Fine focus. Din Objectives – 4X, 10X, 40XR, 100XR Oil. Magnification – 40X, 100X, 400X, 1000X. Head – Binocular. Stage – Mechanical stage, 1.25 abbe Condenser, Iris Diaphragm. Halogen Illumination. The ST-800 advanced series has been designed to be user friendly with a smooth, reverse nosepiece and coarse and fine focusing. Superior quality 10x wide field eyepiece with calibrated pointer for measuring. Head is 360º rotatable. DIN achromatic objectives. Reverse nosepiece for more working room on stage. Stage has tension adjustment to virtually eliminate stage drift. Positive stops at both ends of stage travel to prevent damage to specimens and optics. Abbe condensor/iris diaphragm combo. Siedentopf binocular head with diopter adjustment on the left eye tube. Size 18″ inches high. Limited Lifetime Warranty.