William Optics 105-148mm Bahtinov Focus Mask

Always sharp, even at faint stars

The William Optics 105-148mm focusing mask helps you focus quickly and accurately. It is made of high-quality acrylic glass with a light transmission of 92%. This keeps your image clear and sharp, even with faint stars.

Clearer bending pattern

The imprint pattern of the mask is three times more pronounced than classic metal masks. This allows you to see the inflection more clearly and adjust the focus more quickly and precisely.

Easy to use

The mask fits telescopes from 105 to 148 mm in diameter. Simply place it over your telescope, and you're ready to focus. Thanks to the acrylic glass, you immediately notice the difference in clarity and contrast.

Specifications

General