SplashNColor Tri-Bahtinov Focus and Collimation Mask for TPO RC6 Telescope – Precision Star Focusing | Optical Alignment Tool | Fits 6-Inch Ritchey-Chrétien and Schmidt-Cassegrain

Product Information

About

Available in White — PRECISION TRI-BAHTINOV FOCUSING — Engineered slit pattern produces three distinct diffraction spikes so you can achieve pinpoint star focus in seconds. Eliminates guesswork and delivers consistently sharp images across your imaging train, session after session.
FAST COLLIMATION VERIFICATION — Check primary and secondary mirror alignment right at the scope without removing the optical tube assembly. Offset diffraction patterns instantly reveal tilt or misalignment so you can correct before wasting precious clear-sky time.
SECURE FRICTION-FIT DESIGN — Slides snugly over the front aperture and holds firm during slewing and tracking. No clamps, no adhesive, no hardware needed. Removes just as easily when you are ready to start your imaging or visual observation session.
DURABLE OBSERVATORY-READY BUILD — Rigid construction withstands repeated field use, dew-heavy nights, and temperature swings from storage to cold observatory conditions. Lightweight enough to keep in your accessory case without adding noticeable bulk to your kit.
DESIGNED FOR 6-INCH APERTURE SCOPES — Purpose-built dimensions match the outer tube diameter of popular 6-inch Ritchey-Chrétien and Schmidt-Cassegrain telescopes. Verify your scope's outer tube measurement before ordering to ensure a snug, rattle-free fit.

Product Description

Achieving critical focus and confirming optical collimation are two of the most important steps in any telescope session, yet they are often the most frustrating. The SplashNColor Tri-Bahtinov Mask simplifies both tasks into a single accessory that slides over the front aperture of your 6-inch scope. The tri-panel slit pattern generates three independent sets of diffraction spikes when aimed at a bright star. By comparing the symmetry and intersection points of these spikes, you can confirm that your primary and secondary mirrors are properly aligned and that your focuser is dialed in to the sharpest possible point. The entire process takes just minutes, replacing the tedious back-and-forth of traditional star tests. Installation requires no tools or modifications to your telescope. The mask seats firmly around the outer circumference of the optical tube through a precision friction fit. It stays secure during slewing and tracking, yet lifts off cleanly when you are ready to observe or image. Built to handle real-world field conditions, the mask resists moisture, temperature swings, and the inevitable bumps of transport between home and your observing site. Its compact profile fits easily into a padded accessory case alongside eyepieces and filters. Whether you are a visual observer chasing planetary detail or an astrophotographer stacking long exposures on faint deep-sky targets, proper focus and collimation are the foundation of every successful session. This mask gives you a reliable, repeatable method to confirm both before your first frame.