Cahill Rooftop Observatory

Equipment Database - 40-80× Eyepiece

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40-80× Eyepiece
Optical DesignBrandon
Barrel Size1.125"
Threaded for FiltersNo
Focal Length26.6 mm
Field Stop22.6 mm
Apparent FOV49°
Eye Relief14 mm

Usable on:

This eyepiece has a helical focuser built into the tube, making it the only eyepiece that can be used with the Questar's finderscope mode. However, the image quality is quite poor.