Bahtinov Focusing Mask

Introducing the newest family of focusing aids to the Kwik Focus line, the Bahtinov Mask.

A Bahtinov mask is a focusing aid for astronomy in general, and astrophotography in particular. It consists of a disk made of opaque material fitted over the your telescope with slots cut out in a specific pattern devised by Russian amateur astrophotographer Pavel Bahtinov. The Bahtinov mask allows digital astrophotographers and visual observers to get razor sharp focus in seconds!

The method is very fast and incredibly sensitive. There is no guessing when you are focused during times of poor to moderate seeing. Simply put the mask on and the status of your focus will become immediately apparent.

The masks have a series of slots that create a unique diffraction pattern that can be used to quickly bring your telescope to focus with an absolute minimum of fuss.

First of all, the aluminum masks come with three adjustable rubber bumpers. This allows them to fit to a wide variety of tube diameters. Simply push the bumper to the desired location on the slot to ensure that the mask is properly centered over your optic. The plastic masks will require the user to devise a method of attachment. We suggest masking tape. Then just focus.

The Bahtinov Mask is probably the easiest product on the market to achieve tight focus for digital astrophotographers.