The Bahtinov mask is named after its inventor, Pavel Bahtinov. This focusing aid enables precise focusing of astronomical images through the focus mechanism of your telescope or using a camera lens.

The Bahtinov mask is a simple yet effective tool that can significantly improve your telescope’s focusing. When used in conjunction with the ZWO Seestar S50 PRO’s autofocus mode, it offers a very simple and quick way to achieve razor-sharp images.

♦ Attach the mask to the telescope and point it at a bright star.
♦ Switch on the camera and observe the constellation via Live View or on your computer.
♦ Use a star of medium brightness to focus; it should not be too bright, but nor too dim. The reflection lines must be clearly visible.
♦ The star should not be exactly in the centre, as the field of view of a corrected telescope or lens is often not 100% flat. Choose a star in the outer third of the field. This will give you better overall sharpness across the entire image.

Delivery:

• Astroprints Bahtinov mask for the lens of the ZWO Seestar S50 PRO