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ZWO Off-Axis Guider (OAG)


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Boost your astrophotography game by adding a ZWO Off-Axis Guider to your telescope kit! 

  • Connects the main imaging camera and the guide camera without the need for a guide scope

  • Adjusts flexibly to your camera and telescope with M42 and M48 adapters

  • Fully compatible with all ZWO ASI cameras

  • Lightweight and elegant outlook with 16.5mm thickness

  • Large 8mm x 8mm prism

[ ONLINE  ONLY ]  Please note this item is specially ordered upon request. We do not hold stock in Mitcham. Please call us at 1300 884 763 to check availability. 

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What's in the box: 

  • OAG body (including a 1.25″ holder, a 5mm extender, and a M42 adapter)
  • M48 adapter (for main imaging camera)
  • M48-M42 adapter (for telescope and flat lens)
  • Hexagon wrench


Mechanical diagram:



Connecting diagram:


User Guide:

1. Calculate the correct required distance for your imaging train 

    Example: You need to attach a 21mm extender to the ASI071 to reach a 55mm back focus distance (This is calculated by 17.5mm + 21mm + 16.5mm = 55mm)


2. Take off the guider prism part and attach the OAG body to your telescope



3. Insert the prism part into the OAG body



4. Mount the guide camera



5. Screw the T2 or M48 adapter on the imaging camera according to your mount type



6. Mount the camera on the OAG in the correct position and lock the 3 screws  



7. The final setup


* Note: Make sure the prism does not block the imaging area; You would use the guiding screws to adjust the guiding camera's focus, and it is better to do this during the day to ensure both the imaging and guiding cameras can reach focus at the same position

Additional Information

Additional Information

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