SVBONY Focal Reducer, M54X1 Field Flattener, Telescope Accessory for SV503 102mm ED Telescope

0.8x focal reducer and field flattener; for refractor telescopes; meet the illumination needs of full-frame shooting. You can get wider starry sky and finer star points; reduced focus; has a better signal-to-noise ratio. You can take dazzling celestial photos; no distortion of the star points on the edge of the photo; good quality picture. It will be durable; multi-coated optics; high polish; hard anodize finished aluminum body; to help reduce weight. About the compatibility; has standard 2"" filter thread; to add light pollution filter; a standard 2-inch socket in front end; to connect to the main lens; M48x0.75 threaded in back end; can be connected with the camera bayonet