Celestron Research Microscope Adjustable illuminator with an illuminator with an Abbe 1.25 condenser, iris diaphragm, filters, and holder Built-in mechanical stage is 123mm x 153mm and has a movement range of 70mm x 40mm Unit has a binocular head 45-degree inclined, 360-degree rotatable, and interpupillary distance of 55mm-75mm Four supplied achromatic objectives 4x, 10x, 40, 100xr (oil) 10x and 15x eyepieces