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3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing

: Bahtinov Focus Mask for Telescopes - Dew Shield Front Diameter from 95-140mm (3.74inch - 5.50inch) - for More Precise and Faster Focusing : Camera & Photo. : Bahtinov Focus Mask for Telescopes - Dew Shield Front Diameter from 95-140mm (3.74inch - 5.50inch) - for More Precise and Faster Focusing : Camera & Photo. The mask attaches securely to your scope using brass screws with soft transparent nylon cover to ensure the finish of your telescope is protected. 。 Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task.The best focus for your telescope quickly and easily. 。 Suitable for telescopes dew shield or front outer diameter from 95mm -140mm (3.74inch - 5.50inch) - for 100mm,120mm skywatcher refractors, Celestron 4 SE etc. 。 Light weight so you won't upset the balance on your scope. Masks now feature 3 holes which can be attached with 3 screws to prevent the mask from falling all the way to the ground 。 It will take less time to achieve perfect focus with your new mask which means you spend more time imaging photons rather than focusing them 。 。The Bahtinov mask is a device used to focus small astronomical telescopes accurately. 。Set up your telescope and imaging equipment as normal. Then simply locate a bright star with your telescope, attach the Bahtinov mask to your telescope and watch the diffraction spike pattern around the star as you adjust the focus. When the middle diffraction spike is centered in the outer spikes, you're in focus. Very little focusing travel is required to move the inner diffraction spike, which means the focus is extremely accurate. 。Suitable for telescopes dew shield or front outer diameter from 95mm -140mm (3.74inch - 5.50inch) - for 100mm,120mm skywatcher refractors, Celestron 4 SE etc. 。Package Include: 。1 X Bahtinov Mask 。3 X Brass bolt 。Others: 。For any reason you are unhappy with any product by us, please do not hesitate to contact us. Any suggestion will be warmly welcomed. 。 。 。

3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing
3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing
3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing
3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing
3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing
3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing
3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing

3.74inch - 5.50inch Dew Shield Front Diameter from 95-140mm Bahtinov Focus Mask for Telescopes - for More Precise and Faster Focusing

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