AF3s Askar 180mm dovetail kit

ASKAR FMA180 is a Triplet air-spaced APO refractor, which includes two pieces of ED (extra-low dispersion) glass, providing excellent correction of chromatic aberration. The high-quality optics producing a flatter image with striking clarity, and it is tested to ensure that high standards for astrophotography and observation.

Focusing can be quite time consuming process even with the Bahtinov mask (especially with narrowband filters). Additionally, focus can shift with temperature change during the night. We have solved this for you with our special rails mounted autofocuser kit, which can compensate for the front movement of the lens during focusing.

If you are an ASIAIR adopter, check out our kit mounting solution for the ZWO EAF autofocuser.


The autofocusing motor rests on the special trolley, connected to the rails. This keeps autofocuser pulley in line with lens focusing ring and enables a balanced, compact solution.

You are getting:


OPTION: temperature sensor
OPTION: remote controller

  • 1x AF3s unit, assembled (trolley, rails, compression rings)
  • 1x 20T MXL pulley
  • 1x 3D printed helical focuser compression MXL ring
  • 1x 3D printed helical focuser compression MXL ring lid
  • 1x 3D printed helical focuser compression MXL ring arm
  • 1x MXL timing belt
  • 2x 10mm M3 bolt (for 3D printed helical focuser compression ring)
  • 6x 25mm M3 bolt (for attaching MXL ring lid)
  • 2x 40mm M3 bolt (for attaching MXL ring arm)
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assembly instructions

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