William Optics

30F, No. 29-5, Sec. 2, Zhongzheng E. Rd., Danshui, Taipei 251, Taiwan

+886-2-2809-3188; www.williamoptics.com

S&T: Dennis di Cicco

William Optics has incorporated an innovative digital readout into its popular dual-speed 2-inch Schmidt-Cassegrain focuser. The new Digital Display Gauge (DDG) SCT Focuser ($248) is designed to thread onto the rear cell of most commercial Schmidt-Cassegrain and Maksutov-Cassegrain telescopes. The DDG and 10-to-1 speed reduction allows precise, repeatable focus, which is displayed with an absolute reading of o.o1 millimeters. A built-in dial thermometer enables you to monitor temperature throughout the evening. The focuser, which can be rotated 360º, has two locking screws for securing the focus position when heavy cameras and accessories are attached. A 1¼-inch adapter is included with purchase.

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