Optec Alnitak Astrosystems Flip Mask - Specify Size Up To 12" Tube

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Optec Alnitak Astrosystems Flip Mask - Specify Size Up To 12" Tube

Remotely Controlled Bahtinov Mask

Building on the success of the Alnitak Astrosystems Flip-Flat, Optec has designed the Flip-Mask, remotely controlled Bahtinov Mask.

A number of customers have asked for a way to introduce a diffraction mask into the light path for remote observatories.  Their solution is the Flip-Mask.  With this new device and proven Alnitak software, automated scripting programs such as ACP, CCD Autopilot, and Maxim D/L can be configured to automatically position a custom size Bahtinov Mask for precision focusing, then remotely move it out of the path once focus is achieved and verified. 

Optec masks are precision cut on our in-house laser engraving /cutting machine up to 12-inches in diameter.  Contact OPT Sales if you have a different preferred diffraction mask or wish to adapt a mask you already own.  Some weight limitations may apply.


Bahtinov Masks will be made to match the customer's OTA- up to 12-inch diameter.



  • Bahtinov Mask Diameter:    Customer Request - up to 12-inches (30 cm)
  • Control Box Dimensions: 2.25 x 3.15 x 4.2-inches  (57 x 80 x 106 mm)
  • Weight:     Approximately 1.1-pounds. (0.5 kg)
  • Lamp Pivot Arm:    6.1-inches (155 mm) length
  • Range of Pivot Arm:  95-degrees,
  • Power requirements:  5V DC provided by USB interface,
  • Alnitak Software Compatibility:  Windows XP, Vista, Windows 7 and 8.
  • Command Line Program:  AACmd.exe