The Darkfield Quebec Colony Counter is available in two models. One provides a digital counting display feature. Both models include the following features: An adjustable dish holder for centering round dishes with diameters up to 100mm and square culture plates up to 100mm x 100mm. An optional 1.5X auxiliary lens fits over the standard lens increasing magnification to 3.0X. The adjustable focusing rod allows the 1.5X standard lens to be raised or lowered. The lens also rotates a full 360º for ready access to culture plates. A built-in tilt leg may be mounted in the front or rear of the instrument allowing a convenient tilt angle, or it may be locked flat to the instrument base. A white-ruled Wolffheugel counting plate is included.