Specifications: 1) Magnification of eyepiece: 12.5x / 18B 2) Visual angle of eyepiece: 60° + 90° continuously adjustable 3) Working distance: 170mm 4) Magnification: 4.5 - 25x 5) Diameter of visual field: 50 - 9mm 6) Illumination: 6° + 0° coaxial illumination, 26° oblique illumination 7) Light source: 12V / 100W halogen lamp 8) Illumination control: continuously digital adjustable 9) Luminance on objective plane: ≤100,000 lux 10) Focusing range and speed: 40mm, speed continuously adjustable 11) X-Y range and speed: 50mm x 50mm, speed continuously adjustable