Extra payment for viewfinder exchange - we will include GSO 8x50 RA (angular, 90°) instead of factory set with 8x50 straight-thorough. Option available for GSO Dobsonians and optical tubes. If you would like such an exchange with another brand of telescopes (Sky-Watcher, Orion etc) please write us a short email to receive confirmation that it can be done.
Right-angle (RA) 8x50 viewfinder is usually easier to use and more suitable for searching object in the night sky. If offers correct image both in up / down, as well as left / right directions.