Astromania Bahtinov Mask Focusing Mask for Telescopes - FM80mm for a Tube Outer Diameter (OD) from 85mm-120mm - can be Mounted with The Brass Screws Inside or Outside The drawtube

The Bahtinov mask is a revolutionary tool designed to enhance your stargazing experience by taking the guesswork out of focusing your telescope. Known for its mathematical precision, this mask makes it incredibly easy to achieve perfect focus, even under challenging seeing conditions. Compatible with all types of telescopes, it's crafted from 2mm thick, laser-cut plexiglass, ensuring durability and a long lifespan. Unlike ordinary plastic masks, the Bahtinov mask remains...

The Bahtinov mask is a revolutionary tool designed to enhance your stargazing experience by taking the guesswork out of focusing your telescope. Known for its mathematical precision, this mask makes it incredibly easy to achieve perfect focus, even under challenging seeing conditions. Compatible with all types of telescopes, it's crafted from 2mm thick, laser-cut plexiglass, ensuring durability and a long lifespan. Unlike ordinary plastic masks, the Bahtinov mask remains sturdy and resilient, even in cold weather.

One of the standout features of the Bahtinov mask is its innovative mounting system. With three metal posts, each equipped with non-scratching silicone sleeves, the mask grips the telescope tube gently yet firmly, protecting its surface. This design ensures that the mask stays centered, allowing for a wider compatibility with various telescope models. Whether you're using a reflector or refractor, focusing has never been this easy.

Furthermore, the adjustable design allows for a tube size latitude of approximately 85 to 120mm, accommodating a broader range of optical tubes than many other masks on the market. Just measure your telescope's tube size to select the appropriate mask size. If you're not sure where to measure, our support team is ready to assist you.

Users have reported an impressive ability to visualize diffraction spikes, significantly improving focus accuracy. By optimizing your viewing experience, this focusing mask enhances not just detail but also the sheer enjoyment of astronomy. Whether you're a seasoned astronomer or a budding enthusiast, the Bahtinov mask is your go-to accessory for perfectly focused astronomy sessions.