#19070 - Alnitak Astrosystems Flip-Mask - Custom size up to 12"


In Stock: 2

Remotely Controlled Bahtinov Mask

This product is made to order based on size. Please contact sales@optecinc.com for more information.

Building on the success of the Alnitak Astrosystems Flip-Flat, Optec has designed two new products: a robotic Remote Dust Cover for larger OTA's in remote locations, and the Flip-Mask, remotely controlled Bahtinov Mask.

A number of our customers have asked that we offer a way to introduce a diffraction mask into the light path for remote observatories. Our solution is the Flip-Mask. With this new device and proven Alnitak software, automated scripting programs such as Sequence Generator Pro, 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 Optec Sales if you have a different preferred diffraction mask or wish to adapt a mask you already own. Some weight limitations may apply.

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


  • Bahtinov Mask (user specified size)
  • Motor Controller
  • Cover arm
  • OTA mount bracket
  • Industrial zip straps
  • USB cable

The Alnitak Control Software can be downloaded from our downloads page and includes the AACmd command line program for use with ACP, CCD AutoPilot, Maxim D/L and other astronomy automation programs.

Visit the Alnitak Downloads page for the latest Quick Start Guide,  Alnitak Installation Manual and Software Reference Guide, and Serial Command List.

AACmd can also be used by scripts and batch files to automatically control the Dust Cover. See the Downloads page for additional details.