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The Astroasis Oasis OAG is a compact off-axis guider designed to make back focus planning easier while offering precise prism adjustment and broad system compatibility. With configurable thickness options of 16.5mm, 17.0mm, or 17.5mm, it gives astrophotographers more flexibility when building a clean, well-spaced imaging train. :contentReference[oaicite:2]{index=2}
The Oasis OAG was developed to solve one of the most common frustrations in astrophotography: matching cameras, filter wheels, and guiding components while staying within strict back focus limits. Its modular design allows you to choose the spacing that best suits your system, making it much easier to integrate into a wide range of imaging setups. :contentReference[oaicite:3]{index=3}
One of the standout features of the Oasis OAG is its helical focuser-based prism adjustment. This allows the prism position to be raised or lowered with fine precision, even after the imaging train is assembled, making setup and optimisation far more convenient. The helical focuser provides 6mm of travel, with fine adjustment down to 0.05mm per minor division. :contentReference[oaicite:4]{index=4}
The Oasis OAG uses an 8mm x 14mm prism with anti-reflection coatings on both optical surfaces and blackened non-optical sides to improve transmission and reduce stray light. It is also designed for compatibility with filter wheels from Astroasis, Player One, QHYCCD, Touptek, and ZWO, making it a versatile choice for many modern imaging systems. :contentReference[oaicite:5]{index=5}
Beyond spacing and compatibility, the Oasis OAG includes several practical design touches that make it especially appealing for serious users. These include light-leak protection through O-ring sealing and threaded hole sealing, plus a design optimised for convenient use with the Astroasis 7x2" filter wheel. :contentReference[oaicite:6]{index=6}
The Oasis OAG is designed around a modular thread system and can be configured for different imaging trains using the appropriate M48, M54, or M68 adapter set. Please confirm the correct thread option and spacing requirements for your setup before ordering. :contentReference[oaicite:7]{index=7}