ZWO OAG-L with 12*12 Prism & 1.25" Holder - OAG-L type-binocular-accessories 00″ 317mm\12

00″ 317mm\12

20") Diopter Adjustment Range: ±4 Twilight Factor 40 Relative Brightness: 16 Limiting Stellar Magnitude: Ideal: 12

4 lbs) make it perfect for field use and travel

in order to ensure smooth mounting

About the TeleVue TV76 APO Refractor Telescope - Evergreen

ZWO OAG-L with 12*12 Prism & 1.25" Holder - OAG-L type-binocular-accessories 00″ 317mm\12An OAG, or off axis guider, offers a better way to guide when used with longer focal length telescopes when compared to traditional guide scopes, which can add unwanted weight, balance and possible flexure issues. An OAG also lets you guide at the same focal length as your telescope. This is especially important to focal lengths beyond 1000mm. The ZWO OAG L Off Axis Guider has a large prism size of 12*12mm, far bigger than standard ZWO OAG's prism