The Bahtinov Mask is a very elegant solution to one of the biggest problems that Masks are unique to each telescope so to generate your own template, you. Make Your Own Bahtinov Focusing Mask: A Bahtinov Mask will help focus your telescope or camera lens on Step 4: Cut a Mask Template on the Vinyl Cutter. High Quality Aluminum Bahtinov mask. The Bahtinov mask achieves perfect focus in seconds. The Bahtinov Mask was invented by Pavel Bahtinov from Russia. Click Here for a printable order form. Note that orders will be processed by.

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Note that for larger apertures you’ll need to print a “mosaic” of several pages, and then connect them together.

The focal length of your scope, in mm. You should use Adobe PDF or a similar software for printing. A focussing tool for Astro-photography.

The latest DSLR bahtnov with ‘liveview’ functionality that displays a live view of the light falling on the sensor can help somewhat but this is still not an ideal solution. For refractors, this should be 0.

Home Made Bahtinov Focusing Mask & Templates

Copyright astro jargon. It is important to keep the lines straight and parallel to ensure that diffraction spikes will be bright and thin.

This is what I’ve been waiting for Another tip is to make the inner diameter of the mask slightly larger than required mm and add a thick soft tape inside – this way the mask will be held much bahinov.

  AS1117L 25 PDF

Designing a mask templats drawing, design, or CAD software can be challenging, as the specifics of the mask change for each telescope based on aperture, focal length, and how you plan to attach the mask to the scope. The angle tmplate the horizontal of the angled slots.

Each page has 1 inch overlap and bahhinov which indicate how to connect each piece. This value is similar to that of FWHM but is considered to be more reliable especially in conditions of poor seeing.

The pattern displayed in a Hartmann just gets slightly more in focus, which means the true focus may be off by a significant degree. Required materials for a 8″ mask. The mask is simple to use and users will quickly fall in love with the speed and focusing accuracy produced by the Spike-a Bahtinov mask.

Central obstruction diameter must be a non-negative number. All credit for the mask goes to Pavel Bahtinov for creating the design, and to Dennis Sakva templatd championing it on Cloudy Nights. Extra Precision In recent years, software has been developed to allow sub-pixel accuracy when using a Bahtinov Mask. Good options are red or black.

How to Make a Bahtinov Mask

Bahtinov mask takes guessing out of the equation, and it can be used also on “regular” camera lenses for astrophotography. This unique design also allows more light gathering than a Hartmann mask allowing you to focus on a much dimmer star. Then the annoying task – cutting the plastic. Then simply locate a bright star maybe Spica? During the focusing procedure the mask is placed in front of telescope’s aperture and then the telescope should be pointed to a bright star.


Unless you feel strongly about it, leave this uchecked. Aperture must be a postive number. It is common practice to focus your camera DSLR or astro-CCD on a bright star as this star and the object you want to image will both be at infinity so getting the star in focus will ensure that the deep sky object will also be in focus. Horizontal slot count Horizontal slot count must be a positive integer. The most elegant ways of building the mask are laser cutting, CNC or even 3D printing.

Bahtinov mask is highly superior to the Hartmann focusing mask, its predecessor, however it is more complicated to make.

I’ve made the mask for my 8″ reflector using materials commonly avaliable in an office supply store. You might want to adjust downwards to avoid generating tiny cutouts at the very top and bottom of the right-hand quadrants.

I’ve also read reports on printing the mask on paper with a laser printer and then transfering it to a glass using a hot iron – method which is suitable for making a small mask for DSLR or a refractor. Very little focusing travel is required to move the inner diffraction spike, which means the focus is extremely accurate. Edge thickness must be a positive number.