SplashNColor Bahtinov Focusing Mask for Explore Scientific ED80CF OTA – Precision Star Focus Tool | Friction Fit Telescope Cover | Sharp Astrophotography Aid for 80mm Refractor

["PRECISION STAR FOCUSING TOOL — Engineered slit pattern produces distinctive diffraction spikes that let you achieve pinpoint focus on any bright star. Eliminates guesswork and dramatically reduces time spent adjusting your focuser during imaging sessions.","CUSTOM FIT FOR ED80CF — Designed specifically for the Explore Scientific ED80CF optical tube assembly. Friction-fit design slides securely onto the dew shield opening and stays firmly in place without clamps, adhesives, or modifications to your telescope.","DURABLE LIGHTWEIGHT CONSTRUCTION — Built from rigid ABS material that resists flexing and warping in cold nighttime conditions. Lightweight design adds virtually no balance shift to your imaging setup, keeping your mount tracking smoothly all night.","EFFORTLESS SETUP AND REMOVAL — Simply slide the mask over your telescope aperture and begin focusing. No tools, no hardware, no complicated attachment systems. Remove just as easily when you are ready to start your deep-sky imaging run.","DESIGNED FOR ASTROPHOTOGRAPHY — Achieve critical focus faster whether you are shooting narrowband, broadband, or lunar and planetary targets. Works with any camera or eyepiece setup and pairs with live-view focusing software for repeatable tack-sharp results."]