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: 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. 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. High-Quality Prism: The built-in prism delivers excellent optical performance, with coatings that enhance light transmission and reduce stray reflections. Wide Compatibility: Mechanical interfaces are compatible with filter wheels from Astroasis and other brands like Player One, QHY, Touptek, and ZWO. Light-Leak Protection: Thoughtful design features threaded adapters and sealing O-rings to minimize stray light contamination. Optimized Integration: Tailored to work seamlessly with Astroasis 7×2″ filter wheels for easy assembly and disassembly during imaging sessions. 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 x12) 4.5mm M48x0.75 adapter x13) 5.0mm M48x0.75 adapter x14) 5.5mm M48x0.75 adapter x15) O-ring for light-leak protection x16) Screws7) Hex keys Warranty Astroasis's Warranty
