The Artograph Super Prism Projector is ideal for working from a variety of challenging originals like photographs, half tones, and highly detailed drawings. It features a 3-element, color-corrected lens for extra sharp images and increased brightness. The Super Lens enlarges originals from 3 to 20 times. Includes extra accessory lens to extend the range from 3 times enlargement down to 20% reduction. *Includes 500-Watts of photo quality lighting for a whiter and brighter image. Magnetic door latches and a spring clip keep copy securely in place. Generous 7 x 7 inch (177.8 x 177.8 mm) top-loading, glass covered copy area makes for easy placement of large copy, books, or small 3-D objects. A fan cooling channel system and thermal overload circuit protect originals from overheating. Dark room required.