ZWO OAG Off-Axis Guider

The ZWO Off-Axis Guider (OAG) is engineered to dramatically improve guiding accuracy in astrophotography setups by eliminating differential flexure. Rather than relying on a separate guide scope, this compact unit diverts a small portion of light through a prism to a guide camera—ensuring your imaging and guiding share the same optical path.

With a lightweight, 16.5 mm-thick profile and precision-machined aluminum body, the ZWO OAG easily integrates into imaging trains without adding bulk or introducing flex. Its 8×8 mm prism is large enough to gather adequate light for guiding, yet small enough to stay clear of your main sensor. Compatible with all ZWO ASI cameras, and equipped with M48 and M42 adapters, this guider is ideal for anyone looking to elevate long-exposure imaging with pinpoint star tracking.

• Prism Size: 8×8 mm
• Body Thickness: 16.5 mm
• Material: CNC-machined aluminum
• Front Connection: M48
• Rear Connection: M48 and M42 (adapter included)
• Camera Compatibility: All ZWO ASI cameras
• Use Case: Guiding through same optical path (OAG)
• Focusing Mechanism: Adjustable guide camera holder with thumbscrew
• Adjustment: Prism height and rotation adjustment via thumb screws
• Warranty: ZWO – 2 Years
• SKU Number: ZWO-OAG
• Model Number: OAG

• ZWO OAG Body
• 1.25” Holder
• 5 mm T2 Extender
• M42 Adapter
• M48 Adapter
• M48-M42 Adapter
• Hexagon Wrench