Cloud Break Optics

Innovative Bahtinov Mask Cover (Patented) for WO 102 & 103 Series Telescopes (CPBM-102)

Innovative Bahtinov Mask Cover (Patented) for WO 102 & 103 Series Telescopes - Main image
Innovative Bahtinov Mask Cover (Patented) for WO 102 & 103 Series Telescopes - View 2Innovative Bahtinov Mask Cover (Patented) for WO 102 & 103 Series Telescopes - View 3Innovative Bahtinov Mask Cover (Patented) for WO 102 & 103 Series Telescopes - View 4Innovative Bahtinov Mask Cover (Patented) for WO 102 & 103 Series Telescopes - View 5
$109.02 $158 In stock

Category: Focusing

The Innovative Bahtinov Mask Cover (Patented) from William Optics is designed for WO 102 and 103 series telescopes, including the GT102 and Z103. It is offered as a focusing accessory in a choice of three colors.

  • Patented Bahtinov mask cover design
  • Compatible with WO 102 and 103 series telescopes, including GT102 and Z103
  • Available in Red, Gold, and Blue
  • Product codes: CPBM-102RD (Red), CPBM-102GD (Gold), CPBM-102BU (Blue)
  • Brand: William Optics
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Richard ★★★★★

Swapped out my old generic mask for this one and the difference in focusing precision is immediately obvious. The cover fits snugly on my GT102 and the diffraction spikes snap into alignment with zero guesswork. Really happy with how much sharper my test shots came out.

Ruby V. ★★★★★

I was worried about getting perfect focus, but this mask made it almost too easy—the diffraction spikes snapped into alignment on my first try. The build quality feels solid, and it fits my GT102 like it was made for it.

Elizabeth X. ★★★★★

The alignment marks are incredibly sharp through my scope, and the mask snaps on and off the dew shield without any fuss. I was able to nail focus on my first exposure of M42 after struggling with the stock cap.

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