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Bahtinov Focus Mask, 2mm Focusing Mask Acrylic Telescope Focusing Mask Plate, 60 to 90mm Caliber Fixed Diameter, Telescope Focus Mask for Astrophotography

4.8 (7) Write Review
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$6.59

$ 2 .99 $2.99

In Stock
  • Wide Range of Applications: Bahtinov Focus Mask Works with all types of telescopes, mirrors, refractors, for Dobsonians, for Mak Cas and for , all you need to do is measure your telescope tube size and choose the appropriate mask size.
  • Bahtinov Masks Function: The mask takes the guesswork out of focusing and even overcomes vision conditions to give your telescope the best focus quickly and easily.
  • 3 Metal Posts: The mask grips the telescope tube gently and firmly with three metal posts. These metal posts come with scratch silicone covers to your telescope This prevents slippage while keeping the mask perfectly centered.
  • Post Installation and Lightweight Design: Thanks to this 3 post mount, the mask remains centered while fitting a wider range of telescopes. The bahtinov focus mask for telescopes is lightweight so you won't upset the balance of the scope.
  • Applicable Size: The outer diameter of the bahtinov mask supports the telescope objective lens in the range of 100‑140mm (there is a 1‑2mm error in manual measurement).


Product Description

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Specification:

Item Type: Telescope Focus Mask

Material: Acrylic

Thickness: Approx. 2mm / 0.08in

Color: As Pictures Shown

Weight: Approx. 46g / 1.6oz

The Outer Diameter Size Range of the Telescope Objective Lens Is Supported: Approx. 60-90mm (there is an error of 1-2mm in manual measurement)

Package List:

1 x Bahtinov Mask

3 x Mounting Accessories

Zunate

Tara Pearce
Reviewed in the United States on May 2, 2025
Worked well
zlajoie
Reviewed in the United States on August 31, 2024
I used this on my DSLR lens to assist with star focusing. It works very well.
K. Smith
Reviewed in the United States on August 24, 2024
It was broken in half when I received it.
Danny C.
Reviewed in the United States on June 7, 2024
I use this on my 127mm Celestron telescope, it works great. I appears to be lexan that is cut with a laser, there is protective paper on both sides.
Antonio
Reviewed in Spain on March 30, 2024
Demasiado frágil. Llego roto.
Azphxguy
Reviewed in the United States on December 6, 2024
It didn't fit as expected, some of the lines were popped out or deformed. It shipped in a plain bag without any protection. Though it did arrive in one piece just fine. The deformities appear to have been manufactured this way as they were put together this way. I would have liked to have used it. I guess I needed to measure my scopes OUTER diameter better.
Alexander
Reviewed in the United States on October 15, 2023
Was able to to achieve focus on a star with my Nikon lens using this.