Guide Star 61 w/Soft Case Color:Red Tirion is the practical star-atlas

Tirion is the practical star-atlas master

you will be able to instantly point to any of the celestial objects in the database

Essentially three Bahtinov masks in one

Improved Performance

000 Firmware Upgrade Yes (via mount) Working Temperature -10ºC ~ 40ºC (internal heated) Warranty One year limited

Guide Star 61 w/Soft Case Color:Red Tirion is the practical star-atlasThe William Optics GuideStar 61 lens is the same as ZenithStar 61, but with a draw tube in place of the rack and pinion focuser. It also includes a finder mount rail in place of the standard vixen rail. The main purpose of Guide Star61 is as a guide scope for astrophotography. Can be paired with the Flat61 field flattener for use as an imaging telescope. Description Supports QHY, SBIG, ZWO, and other 1. 25" cylinder type guiding cameras Guide scope