48mm Aperture

This Baader protective T-ring system comes with a 50.4 mm 7nm H-Alpha filter that has been installed in the T-ring body.

This Baader protective T-ring system comes with a 50.4 mm UHC-S Nebula filter that has been installed in the T-ring body

This Baader protective T-ring system comes with a 50.4 mm UV/IR Blocking filter (aka L, or Luminance) that has been installed in the T-ring body.

The Takahashi wide mount t-ring adapts the Takahashi wide mount (WM) thread to a Canon EOS or Nikon digital SLR.

This Baader protective T-ring system comes with a 50.4 mm Clear filter that has been installed in the T-ring body.

This high precision William Optics T-Mount adapter contains wide 48 mm t-threads

Made specifically for Canon EOS R mirrorless DSLR cameras

With the S52/M68 adapter, all Baader Wide T-rings can be adapted directly to an M68 female thread. This allows your M68 telescope or accessories to be screwed firmly to your camera with the largest possible aperture.

This Micro 4/3 T mount from William Optics is made to work with Olympus Cameras.

This T mount from William Optics is made to work with Sony E DSLR Cameras.

This T-Mount from William Optics is made to work with the Fuji FX camera.

Baader T-Ring for Sony E/NEX Bayonet with D52/M48 to T2

Baader Wide-T-Ring to connect Canon EOS DSLR cameras on the Astro T-2 system

Borg Scope DSLR Camera Adapter T-ring for Canon EOS (Borg scope: 50mm thread)

This camera T-mount with 48 mm thread is made to adapt Nikon cameras for all Refractor Telescopes from William Optics.

CNC machined from high quality aluminum and anodized gray

Oversized t-ring for Nikon DSLR cameras. Use it with phoptographic field flatteners that have the oversized 48 mm attachment thread.

This is the oversized 48 mm t-ring for Canon DSLR cameras. Use it with our field flatteners that have the oversized 48 mm thread. The oversized T ring minimizes vignetting.

System M54 – spacer (Fine-Adjustment) rings, available in thickness 0.3mm (black), 0.5mm (red), 1mm (gold)
Very thin ring for finetuning in the M54-system
Ring in M48 diameter without threads
Fits between all M54 threads, equals approx. 2/5 (0.3mm), 2/