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Kendrick Bahtinov Focus Masks

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Email us a question about this ProductKendrick Astro Instruments

Kendrick Bahtinov Focus Masks

This innovative focus mask concept was invented by a Russian amatuer astronomer, Paul Bahtinov, and Kendrick is producing these masks with his permission. 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 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.

How to Use Kendrick Bahtinov Focus Masks

First of all, the 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 focus. The graphic below describes visually what you will see on either side of being focused. This graphic represents movement of the focuser in very small amounts (fractions of a mm). It is extremely sensitive.

The Bahtinov Mask is probably the easiest product on the market to achieve tight focus for visual use and for digital astrophotographers, regardless of whether you use a DSLR or CCD camera.

BM-6001-GS   Bahtinov Mask for 50mm Guide scope
BM-6001-CM    Bahtinov Focusing mask for 60mm Scopes and cameral lenses with a 60mm diameter optic 
BM-6002-CM    Bahtinov Focusing mask for cameral lens with 67mm diameter optic 
BM-6003-CM    Bahtinov Focusing mask for cameral lens with 77mm diameter optic   
BM-6004    Bahtinov Focusing mask for 80 mm optic  
BM-6006    Bahtinov Focusing mask for 90 to 105 mm optic 
BM-6007    Bahtinov Focusing mask for 105mm to 115 mm optic   
BM-6008-SC    Bahtinov Focusing mask for 115mm to 125 mm optic (For C5 SCTs & Mak Cassegrains) 
BM-6008    Bahtinov Focusing mask for 120 mm to 130 mm optic    
BM-6011    Bahtinov Focusing mask for 150 mm to 165 mm optic    
BM-6013    Bahtinov Focusing mask for 8" SCT   
BM-6013-R    Bahtinov Focusing for Celestron 8” Rowe-Ackermann Schmidt Astrograph    
BM-6015    Bahtinov Focusing mask for Celestron C9.25 SCT  
BM-6016    Bahtinov Focusing mask for Meade: 10" SCT   
BM-6017    Bahtinov Focusing mask for Celestron C11 SCT   
BM-6017-R    Bahtinov Focusing Mask for Celestron 11” Rowe-Ackermann Schmidt Astrograph
BM-6018    Bahtinov Focusing mask for Meade 12" SCT
BM-6020    Bahtinov Focusing mask for Celestron C14 and Meade 14


Specifications: Kendrick Bahtinov Focus Masks

  • Material: Plastic

What's in the Box

What's in the Box: Kendrick Bahtinov Focus Masks

  • Kendrick Bahtinov Mask
  • 3 screws covered in rubbery plastic for attachment
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