Telescopes & Astronomy

Upgrade your 50mm guidescope with this precision micro focuser, offering 10mm of smooth, fine-tuned travel for razor-sharp star focus during autoguiding sessions. Compatible with popular finderscopes from Skywatcher, Celestron, GSO, and more, it features both M42 and 1.25-inch connections to suit a wide range of guide cameras and eyepieces. A brass compression ring ensures a secure, scratch-free hold for reliable performance all night long. Use with right-angled finderscopes.

Easily connect M48-threaded accessories to your Schmidt-Cassegrain telescope with this precision-machined adapter. Featuring a standard SCT female thread on one end and an M48 male thread on the other, it provides a secure and seamless interface for filters, cameras, and other imaging equipment.

This handy step-down adapter lets you connect standard M42 T-thread accessories to equipment featuring the larger M48 thread. Simply thread it on to bridge the gap between these two common telescope and camera accessory sizes, making it easy to expand your imaging setup without replacing existing gear.

The Sirius 2" Parfocal Ring eliminates the need to refocus your telescope every time you swap eyepieces. Simply lock the ring onto each eyepiece barrel at its precise focus point, and enjoy seamless, shake-free transitions between magnifications during your observing sessions. It's also ideal for astrophotography, allowing you to match your calibrating eyepiece's focus to your camera for fast, accurate results.

The Sirius 1.25 Inch Parfocal Ring eliminates the need to refocus your telescope every time you swap eyepieces. Simply lock the ring onto each eyepiece barrel at its precise focus point, and enjoy seamless transitions between magnifications during visual observing or astrophotography sessions. It's a simple, affordable upgrade that saves valuable time at the eyepiece.

The Sirius Optics Plossl 15mm eyepiece delivers a generous 50°+ apparent field of view, making it a versatile choice for both deep-sky and planetary observation. Its classic symmetrical doublet design offers sharp, well-corrected views in any 1.25-inch focuser, while the 15mm focal length provides comfortable eye relief for extended viewing sessions.