On Sale Bahtinov Focus Mask - 195-240mm Outer Diameter
Achieve pinpoint focus for astrophotography with this Bahtinov focusing mask, designed for telescopes with 195–240mm outer diameter. Easily attaches with padded pegs and provides a clear diffraction pattern for accurate and repeatable focusing.
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Achieve precise, pinpoint focus with this Bahtinov focus mask, designed for telescopes with an outer diameter of 195mm to 240mm. An essential tool for astrophotographers, the Bahtinov mask simplifies the process of accurate focusing by producing a distinct diffraction pattern. When correctly aligned, the central spike shifts into perfect symmetry—clearly indicating optimal focus for imaging or observation.
This Bahtinov focusing mask is particularly valuable when using cameras or telescopes without a traditional eyepiece, ensuring your images are sharp and clear. Whether you’re capturing deep-sky objects or planetary detail, this mask helps eliminate focus guesswork, saving valuable imaging time.
The mask is easy to attach—simply place it over the front of your telescope and use the adjustable padded pegs to secure it in place. Once mounted, focus your telescope until the diffraction spikes converge. Ideal for refractors, Newtonians, and Schmidt-Cassegrain telescopes within the supported diameter range.
Find the correct size for your telescope
| SKU | Description |
| OC-FOCUSMASK-60 | Bahtinov Focus Mask - 65-100mm Outer Diameter |
| OC-FOCUSMASK-80 | Bahtinov Focus Mask - 85-120mm Outer Diameter |
| OC-FOCUSMASK-100 | Bahtinov Focus Mask - 105-150mm Outer Diameter |
| OC-FOCUSMASK-120 | Bahtinov Focus Mask - 125-180mm Outer Diameter |
| OC-FOCUSMASK-150 | Bahtinov Focus Mask - 150-200mm Outer Diameter |
| OC-FOCUSMASK-180 | Bahtinov Focus Mask - 195-240mm Outer Diameter |
| OC-FOCUSMASK-200 | Bahtinov Focus Mask - 215-260mm Outer Diameter |
Product Code: FOCUSMASK-180