Focusing Masks

Designed for telescopes with apertures between 105mm and 148mm Precise focusing aid for astrophotography and visual observation Descri...

Designed for telescopes with apertures between 172mm and 235mm Precise focusing aid for astrophotography and visual observation Descri...

Designed for telescopes with apertures between 243mm and 308mm Precise focusing aid for large aperture telescopes and astrophotography ...

Precise focusing aid for telescopes with apertures between 75mm and 110mm Adjustable design to fit various telescope sizes within the specif...

Bahtinov mask cover for William Optics GT71, Z73, and Star71II telescopes Enhances focusing accuracy for astrophotography Description ...

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

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

Bahtinov mask cover for William Optics 102 & 103 Series telescopes Enhances focusing accuracy for astrophotography Description T...

Precision focusing aid for the William Optics FLT132 telescope Custom-designed to fit the FLT132 model perfectly Description T...

Precision focusing aid for the William Optics Z61 telescope Custom-designed to fit the Z61 model perfectly Description The Wil...