Telescopes & Astronomy

The Sirius Optics M48 T-ring for Nikon lets you seamlessly connect your Nikon DSLR to any telescope with an M48 thread, making it easy to dive into astrophotography. Designed with full-frame sensors in mind, the wide M48 connection minimizes vignetting for cleaner, edge-to-edge images of the night sky.

Getting your back-focus distance right is essential for sharp, well-corrected astrophotography and sometimes you need more than thin shims to bridge the gap. This M48 x 0.75mm aluminium alloy spacer ring provides 10mm of solid, threaded spacing to help you build out your imaging train with precision. Also available in various sizes to suit your specific setup requirements.

Getting your back-focus distance right is essential for sharp, well-corrected astrophotography and sometimes you need more than thin shims to bridge the gap. This M48 x 0.75mm aluminium alloy spacer ring provides 35mm of solid, threaded spacing to help you build out your imaging train with precision. Also available in various sizes to suit your specific setup requirements.

T-ring with M42 thread.

T-Ring for Sony Alpha DSLR (A-Mount - Full Size DSLR). A "T-Ring" couples your SLR or DSLR camera body to a T-Adapter or other "T" threaded camera mount. 

The Sirius Optics 2 Inch Variable Extension Tube features a standard 2" barrel and M42 male thread, allowing you to fine-tune your imaging distance for precise focus when connecting a camera to your telescope. Simply pair it with an M42 T-ring to attach your camera, and adjust the extension length to achieve optimal spacing for astrophotography through any 2" focuser or visual back.

Getting your back-focus distance right is essential for sharp, well-corrected astrophotography and sometimes you need more than thin shims to bridge the gap. This M48 x 0.75mm aluminium alloy spacer ring provides 5mm of solid, threaded spacing to help you build out your imaging train with precision. Also available in various sizes to suit your specific setup requirements.