Telescopes & Astronomy

• Standard SCT Thread
• M42 T-Thread

The Sirius Optics Vixen Dovetail 18cm features a hollow underside with two slotted 1/4" holes running the full length, providing versatile mounting options for cameras and accessories. Designed to securely attach your gear to any mount accepting a standard Vixen dovetail, this lightweight yet sturdy plate offers flexible positioning to suit a variety of imaging and observation setups.

M42 x 0.75mm Aluminium Alloy Extension Spacer Ring for telescope photography. This 5mm spacer can help you achieve precise back-focus spacing in your imaging train.

M42 x 0.75mm Aluminium Alloy Extension Spacer Ring for telescope photography. This 20mm spacer can help you achieve precise back-focus spacing in your imaging train.

M42 x 0.75mm Aluminium Alloy Extension Spacer Ring for telescope photography. This 40mm spacer can help you achieve precise back-focus spacing in your imaging train.

• For use with 2” eyepieces.
• One of the essential eyepiece filters for visual astronomy.
• Reduce glare from bright objects such as the Moon, Venus, and Jupiter.
• Accentuate subtle detail for the Moon and planets
• Polar ice caps of Mars in large telescopes
• Limb hazes and terminator clouds of Mars

• This Celestron T-Adapter connects a DSLR camera to a NexStar 4SE or C90 spotting scope for prime focus photography
• Threads onto the rear cell for secure, wiggle-free connection
• T-threads accept camera brand specific T-Ring (sold separately)

• Fits telescopes with 1.25” focusers or visual backs, 90° viewing angle, best for observing objects overhead
• Accepts standard 1.25” eyepieces, Barlow lenses, and other accessories with a 1.25” insert barrel

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.