Baader Planetarium 50.8 mm MPCC Mark III (Multi-Purpose Coma Corrector for Newtons). The only coma corrector for Newton telescopes, that neither reduces the focal length nor the image field of your telescope. For all Newtonians, with removable 2" collar. With removable T-2 thread and M48 outer thread.
The Vixen SD Reducer HD Kit includes the SD Flattener HD filed flattener, the SD Reducer HD aplanatic focal reducer, the EX Tube 66 extension tube and the specific extension tube to be used along the SD81S. Complete correcting and reducing lens system for Vixen SD81S, SD103S e SD115S optics.
The Vixen Reducer HD Kit for Vixen FL55SS apochromatic refractor includes the Flattener HD field flattener for FL55SS, the Reducer HD aplanatic focal reducer for FL55SS and the EX Tube 66 extension tube. Complete correcting and reducing lens system for Vixen FL55SS fluorite apochromatic refractor. Advanced Vixen AS Coating with 99.9% light transmission on...
SkyWatcher 0.85x reducer / corrector for Evostar 72ED. Focal reducer designed to improve Evostar 72 ED refractor performance. This field flattener features M48 thread.