Antlia OAG and Filter Drawer Assembly

The Antlia OAG and Filter Drawer Assembly is an innovative astrophotography accessory that seamlessly integrates a filter drawer with an Off-Axis Guider (OAG). By utilizing a pick-off prism to redirect a fraction of light from the primary image train to the autoguider, it eliminates the need for a separate heavy guide scope. Because the autoguider and the main imaging camera share the exact same optical path, this assembly effectively counters flexure, bending, and tilting, delivering significantly higher tracking accuracy for long-exposure imaging.

【Key Features & Technical Highlights】

• One-Piece Mono-Block Design: Precision CNC-machined from a single block of aluminum to combine the OAG and filter drawer into a rigid platform.

• Large 12 x 12 mm Pick-off Prism: Accommodates larger autoguiding sensors, offering a wider selection of available guide stars.

• Full Frame & APS-C Compatibility: Fits APS-C and Full Frame sensors comfortably, with adjustable prism height to optimize illumination without blocking the main sensor.

• 37.5 mm Total Thickness: Total optical length is 37.5 mm including side adapters, matching cameras with a 17.5 mm back-focus distance seamlessly.

• High-Quality 1.25-Inch Helical Focuser: Features 10 mm of smooth focus travel to quickly achieve optimal focus on guide stars.

• 360-Degree Rotation & Locking: Threaded dovetail-type adapters allow full 360-degree rotation and locking for easy target framing and guide star acquisition.

• Universal Adapter Compatibility: Includes a comprehensive set of M42, M48, M54, and M68 male/female adapters to work with diverse camera and telescope combinations.

Specifications