Astrozap AstroCap Bahtinov Mask

A Bahtinov mask uses a specific grid pattern to create a diffraction spike pattern on bright stars. When the central spike is perfectly centered between the two outer spikes, you have achieved precise focus, removing the guesswork often associated with manual focusing.

Yes, this mask is designed to fit any 7-inch Maksutov or 8-inch Schmidt-Cassegrain telescope, regardless of the brand, provided the outer diameter of your telescope tube matches the specifications for these common sizes.

The AstroCap series is built to withstand the rigors of field use. It is constructed from sturdy, lightweight materials designed to handle temperature fluctuations and the occasional bump during setup, and it is backed by a 1-year warranty.

Yes, you must remove the mask once you have achieved focus. Leaving it on during your actual imaging session will obstruct light and create diffraction artifacts in your final photographs.

While it is primarily designed to help astrophotographers nail critical focus for long-exposure imaging, it can also be used for visual observation if you are struggling to find the sharpest point of focus on a bright star or planet.