William Optics Imaging Accessories

Adds 360° of smooth camera rotation Designed for William Optics 2.5" focusers Secure M63 male and female threads Maintains optical alignment durin...

Fits Telescope Dew Shields from 105mm to 148mm Generates Clear Diffraction Spikes for Focusing Removes Subjectivity from Manual Focusing Lightweig...

Fits Telescope Dew Shields from 75mm to 110mm Creates Sharp Diffraction Spikes for Precise Focusing Ideal for Small Apochromatic Refractors and As...

Designed exclusively for the William Optics RedCat 51 astrograph Corrects image plane tilt for perfectly round stars across the frame Adds only 12...

Fits Dew Shields with Outer Diameters from 243mm to 308mm Generates a Clear Three-Spike Diffraction Pattern for Precise Focusing Essential Tool fo...

Patented Bahtinov mask integrated into a dust cover Precision-cut pattern for accurate focusing Designed for William Optics GT71, Z73, and Star71I...

Fits Dew Shield Diameters from 172mm to 235mm Generates Clear Diffraction Spikes for Precise Focusing Ideal for Astrophotography of Planets and De...

Bahtinov mask cover for Takahashi FSQ106 telescope Enhances focusing accuracy for astrophotography Description The William Optics Ba...

360° of precise framing rotation Standard M54 male and female threads Adds a minimal 30.2 mm to the optical path Securely locks orientation for lo...

Bahtinov mask cover for William Optics GT81 and Z81 telescopes Enhances focusing accuracy for astrophotography Description The Willi...