A terrific addition to any pro or hobbyist's studio. This magnifier permits hands-free, illuminated work. The clear acrylic lenses yield a wide viewing area as well as excellent detail for close-up work. The magnifiers are readily changed with minimal effort and also allow you a broad spectrum of magnification factors. Focal lengths may be changed from 1.2x, 1.8x, 2.16x, 2.5x, 3x, 3.5x, 4.2x, 6.3x and 8.75x.