QHY OAG-M Pro
QHY
QHY OAG-M Pro guides through the main telescope's light path to reduce flexure on demanding imaging rigs.
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Specifications
Overview
- Guider type
- Off-axis guider
Mechanical
- Format
- Medium-format OAG
Use
- Primary use
- Guiding through the main imaging telescope to eliminate guide-scope flexure
Specifications
- Weight
- 155 g
Astrophotography Fit
Best for long focal length or mirror-based systems where a separate guide scope can drift relative to the imaging camera.
QHY OAG-M Pro uses a pick-off prism ahead of the camera so the guide camera sees the same tracking errors as the imaging sensor. That makes it the preferred guiding approach for SCTs, RCs, and long refractors.
Setup takes patience: prism height, guide-camera focus, back focus, and filter-wheel spacing all interact. Once dialed in, it is more dependable than a separate guide scope for demanding rigs.
Best paired with
- SCT, EdgeHD, RC, or long refractor imaging trains
- Sensitive guide cameras with enough sensor area for guide-star choice
- Threaded camera/filter-wheel stacks with known back focus
Not recommended for
- Very short wide-field rigs where a guide scope is simpler
- Beginners who need the easiest possible guiding setup
- Imaging trains with no back-focus room for an OAG body
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Cloud Break Optics Cloud Break Optics | $239.00 | In stock Updated 5/11/2026 | View Offer - $239.00 |