Astroasis
Astroasis Oasis OAG
Astroasis Oasis OAG
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Astroasis Oasis OAG
The Oasis OAG is a precision-engineered off-axis guider designed to solve back-focus challenges and provide superior guiding performance for astrophotography setups.
This accessory allows you to pick off a portion of the light path from your main imaging train to feed a guide camera without introducing significant optical distance, making it ideal for use with filter wheels and various telescope systems.
Key Features:
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Adjustable Thickness: The OAG offers configurable back-focus options (16.5 mm, 17.0 mm, or 17.5 mm) through a modular adapter system to match different instrument configurations.
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Precise Prism Positioning: A helical focuser allows fine adjustment of the internal prism’s position without disassembling your imaging train — a unique convenience when optimizing guiding focus.
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High-Quality Prism: The built-in prism delivers excellent optical performance, with coatings that enhance light transmission and reduce stray reflections.
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Wide Compatibility: Mechanical interfaces are compatible with filter wheels from Astroasis and other brands like Player One, QHY, Touptek, and ZWO.
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Light-Leak Protection: Thoughtful design features threaded adapters and sealing O-rings to minimize stray light contamination.
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Optimized Integration: Tailored to work seamlessly with Astroasis 7×2″ filter wheels for easy assembly and disassembly during imaging sessions.
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Flexible Hardware: Users can choose from different screw types to fine-tune how the OAG connects to their equipment.
Technical Specifications
| Specification | Details |
|---|---|
| Configurable Thickness | 16.5 mm, 17.0 mm, or 17.5 mm (using included threaded adapters) |
| Main Body Thickness | 12 mm |
| Adapter Ring Options | 4.5 mm, 5.0 mm, 5.5 mm (for achieving total configurable thickness) |
| Prism Size | 8 mm × 14 mm |
| Prism Optical Coatings | Anti-reflection on optical surfaces; blackened non-optical sides |
| Prism Adjustment Travel | 6 mm total (via helical focuser) |
| Helical Focuser Precision | 0.05 mm per minor division (20 minor per full rotation) |
| Minimum Prism Position from Optical Axis Center | 9 mm (starting position) |
| Thread Interfaces (Telescope Side) | Selectable M68×1, M54×0.75, or M48×0.75 (one set included; others optional) |
| Filter Wheel Compatibility | Astroasis, Player One, QHYCCD, Touptek, ZWO |
| Light-Leak Protection | O-ring sealing with recessed adapter design |
| Guide Camera Interface | Standard guide camera connection via prism post and helical focuser (typically M28.5×0.6 guide camera thread) |
| Optimized For | Astroasis 7×2″ filter wheel setups |
In the Box
1) Main body, including the prism and helix Focuser x1
2) 4.5mm M48x0.75 adapter x1
3) 5.0mm M48x0.75 adapter x1
4) 5.5mm M48x0.75 adapter x1
5) O-ring for light-leak protection x1
6) Screws
7) Hex keys
Warranty
Astroasis's Warranty
