2 "NEWTON-Glaswegkorrektor 1.7 xmit integrated coma corrector (front side with 2" filter thread)
The large Glaswegkorrektor allow to virtually "assemble connection a binocular! The owner of" EVERY telescope with two fast "ie short focal length refractors and photographic Newton can enjoy without vignetting and without reflexes or other light loss the sight of deep sky objects with both eyes .