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ZWO EAF Mount for Specific Telescopes



These dedicated brackets allow you to mount a ZWO Electronic Automatic Focuser (EAF)  onto various telescopes.

William Optics Redcat 51 and Redcat 71

The drive system is belt driven and results in zero additional backlash.  See the autofocus image.  You will notice that the V-curve is very symmetrical and the "V" is nice and sharp. This means the backlash is very low and any backlash is likely from the EAF itself. 

The side opposite the EAF has a standard Synta shoe/saddle for mounting additional accessories such as an ASIAir or Pegasus Powerbox etc.   

Redcat 51 notes:  The bracket can be mounted with or without the top handle and different length mounting screws are provided.   The design also allows the bracket to remain on the scope even when the dew shield is reversed, covering the rubber grip for transport.

REDCAT 51 VERSION NOTE: There have been 3 versions of the Redcat 51. The original (V1) had two threaded mounting holes on the side of the scope ring. The later two versions (V1x and V2) have 4 threaded holes on the top of the scope ring. This bracket will work with V1x and V2. A bracket for the Redcat 51 V1 is available upon request by sending a message to buckeyestargazer@gmail.com.


Askar FMA230

Since the focus ring on the Askar FMA230 helical focuser also moves with rotation, an innovative design was necessary to mount an EAF on the scope.  This was accomplished by creating a longer EAF pulley and incorporating a support pin on the other side of the pulley so the pulley does not flex during use.

The bracket can be mounted on either side of the scope, and all necessary hardware is included.


Other EAF Brackets for Specific Telescopes


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Printed in durable, temperature tolerant PETG filament.

EAF-Redcat51 Installation Instructions: download

EAF-Redcat71 Installation Instructions: download

EAF-AskarFMA230 Installation Instructions: download

EAF-TVis Installation Instructions: download

EAF-SVAccess Installation Instructions: download

EAF-Lunt-Crayford, EAF-Lunt-RP Installation Instructions: download