The JMI EV-1CM is a fine motorized rack-and-pinion focuser designed to work with Cassegrain Telescopes from 6" to 16" diameter. It is a 2" anodized aluminum focuser equipped with rubber grip knobs, standard brass ring and reducer to accept 1.25" eyepieces. The EV-1CM can support up to 8 pounds. It features dual-speed manual control capability for rapid and fine focus. The rapid focus adjustment is 1 1/2 times faster, and the fine focus adjustment is 15 times finer than any other products of its class. This motorized version comes with the SCT threaded output adapter to allow use of standard SCT equipment. The hand unit has an electronic brake to stop the motor during usage. Some older Meade LX200 telescopes do not supply enough power to run the motor on the low setting.