William Optics 172mm -235mm Bahtinov Focusing Mask

The William Optics 172mm -235mm Bahtinov Focusing Mask is an essential tool for astronomers and astrophotographers seeking precise focus for their telescopes. This versatile mask is designed to fit telescopes with apertures ranging from 172mm to 235mm, making it suitable for a wide range of medium to large aperture instruments.

Ensure compatibility with your specific telescope model. This mask is designed for telescopes with apertures between 172mm and 235mm.

Precision Focusing

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The Bahtinov mask utilizes a unique pattern of slits that create diffraction spikes around bright stars. By aligning these spikes, astronomers can achieve precise focus quickly and easily, resulting in sharper images and improved visual observations.

Durable Construction

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Crafted from high-quality, lightweight materials, this Bahtinov mask is built to withstand the rigors of regular use in various observing conditions. Its robust construction ensures longevity and consistent performance.

Versatile Compatibility

With its adjustable design accommodating apertures from 172mm to 235mm, this Bahtinov mask is compatible with a wide range of telescopes, including many popular Schmidt-Cassegrain, Ritchey-Chrétien, and large refractor models.

Easy to Use

Simply place the mask over the aperture of your telescope and focus on a bright star. The diffraction pattern created by the mask makes it easy to identify when perfect focus is achieved, even for those new to astrophotography.

Improved Image Quality

By facilitating precise focus, this Bahtinov mask helps astrophotographers achieve sharper, more detailed images of celestial objects. It's particularly useful for deep-sky astrophotography where precise focus is critical.

Visual Observation Enhancement

While primarily used for astrophotography, this focusing mask can also benefit visual observers by ensuring their telescope is precisely focused, resulting in crisper, more detailed views of celestial objects.

Compact and Portable

Despite its large size range, this Bahtinov mask is designed to be lightweight and easy to transport. It's an essential addition to any astronomer's field kit, taking up minimal space while providing significant benefits.