Cloud Break Optics

Bahtinov Mask Cover (Patented) for WO 70 Series Telescopes (CPBM-71)

Bahtinov Mask Cover (Patented) for WO 70 Series Telescopes (CPBM-71) - Main image
$87.32 $118 In stock

Category: Focusing

The Bahtinov Mask Cover (Patented) from William Optics is designed for WO 70 series telescopes, including the GT71, Z73, and Star71II. It is offered in a choice of Red or Gold.

  • Patented Bahtinov mask cover design
  • Compatible with GT71, Z73, and Star71II telescopes
  • Fits the WO 70 series
  • Available in Red and Gold color options
  • Product codes: CPBM-71RD (Red), CPBM-71GD (Gold)
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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 (4.8 / 5 · 5 reviews)

Carter T. ★★★★★

I was a bit skeptical about the red color, but it actually looks great against the night sky and aligns perfectly with my GT71. The mask snaps on securely without any wobble, making focus checks quick and painless.

Eli ★★★★★

The mask snaps onto my 71mm scope perfectly, no tools needed. Focus snaps are way sharper now compared to my old DIY version. Took me just a couple minutes to nail focus on my first try.

Aurora ★★★★★

The gold finish matches my telescope perfectly, and the mask snaps on securely without any wobble. I was able to dial in focus in under a minute on a test star.