Askar Off Axis Guider OAG

ASKAR Off Axis Guider OAG

Off Axis Guider (OAG) Is Optimized For Longer Focal Length Telescope Or To Use With Refractor Without And External Guide Scope. As Guiding Essential For Error Correction In Tracking To Achieve Sharper Astrophotography Image, It Is A Must Have Accessories

ASKAR OAG Use 10x10mm Prism And Includes Multiple Adapter Supporting Different Type Of Telescope And Accessories Like Filter Wheel, Filter Drawer And Camera. Back Focus IS 19.5mm

This OAG Is Optimized For ASKAR Filter Drawer. It Is Optimal For Usage With Petzval Design Refractor. For Telescope Needing 55mm Back Focus With Non-ASKAR Filter Drawer, 16.5mm Spacer With Most Camera Works Ok (53.5mm Back Focus)