This Questar #19151 16mm illuminated crosshair reticle eyepiece is used for guiding long-exposure deep space photographs with a Questar 3.5" or 7" telescope. It is designed to be used with the Questar Starguide off-axis guider in conjunction with a scope equipped with a Powerguide drive corrector and electric declination motor.
This Questar eyepiece includes a self-contained battery-powered variable intensity LED illuminator and is dual-threaded to provide both reticle focus and crosshair swiveling capabilities (to line up the crosshairs with the scope's direction of motion).
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