Astrophotography Accessories

M42 x 0.75mm Aluminium Alloy Extension Spacer Ring for telescope photography. This 15mm spacer can help you achieve precise back-focus spacing in your imaging train.

Bring out the best in your nebulae astroimages with the H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA. This specialized filter allows high transmission of light from emission nebulae while blocking light pollution, helping to make your images pop with detail off the black sky background with superior contrast.

Fortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these “bad” wavelengths, the filter essentially eliminates the effect of light pollution while letting the “good” wavelengths of light associated with the emission nebula pass through to the camera. You’ll notice much higher contrast in your images immediately, even if imaging from your light polluted backyard! And since the transmission at the key wavelengths is so high, the nebula will not be dimmed—only the background will be blacker.

If you need to keep your imaging accessory weight down, this guidescope is just the thing.

NOTE: Weight of the guidescope is 300 grams. 

• Custom made for CGX and CGX-L Mounts
• Adjustable bracket angle for best accessibility
• 6x magnification
• Simple reticle map easily locates the celestial pole without the need to reference an app or location & time
• Scope tilt is adjustable to allow for accurate polar alignment

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 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.