The Mahr Federal 4246006 MM 200 Measuring Microscope with Variable Zoom 8-40x Magnification and a 23-4mm Field of View. These measuring microscopes are for distances and angles (with the ocular head 200w), for example: punched and flexible parts, plastic components as well as electronic circuit boards. Featuring high quality optics for light intensive and sharp three dimensional images, zoom lenses with continuous variable magnification and/or fixed lenses. An ergonomic hand wheel for focusing, mounted on either side making it ideal for right or left handed operators. The prism head has a 45 degree tilt with dioptic adjustment. Also has a dimmable LED ring light, LED transmitted light, robust cast stand and mounted XY table precision.