Sky-Watcher 0.77x Focal Reducer / Flattener for Esprit 120 ED APO f/7 Refractor S20209
$500.00
Free Express Shipping! Sky-Watcher 0.77x Focal Reducer / Flattener for Esprit 120 ED APO f/7 Refractor For Astrophotography/Astroimaging, Virtually Eliminate Spherical Aberration, Shortens Focal Ratio from f/7 to f/5.4, Reduces Exposure Times by 68%,...