What it does and why you need it Reduces unwanted reflections in reflective astronomical telescopes and improves the quality of mirror photography. Designed to control stray light and produce clearer reflective images for both observation and imaging. Built for repeatable, stable alignment so your optical setup stays precise during use, transport, and inspection. Key features and benefits Materials and durability: Machined from quality alloy with optical glass elements for reliable optical performance and a long service life. Compact and lightweight: Small form factor makes it easy to add to an existing telescope or inspection rig without adding bulk. Simple camera connection: Standard M42 thread accepts cameras directly and adapts to a variety of 1.25' astronomical telescopes. Stable mounting and illumination: Includes adjustable LED illuminators and durable mounting arms to help achieve precise alignment and consistent, controllable lighting for inspection and imaging tasks. Easy to install and use: Designed for quick attachment and straightforward operation so you can focus on observation or inspection rather than setup. Performance and compatibility Compatible with telescopes using 1.25' eyepiece interfaces and cameras or adapters that accept an M42 thread connection. Provides practical control of reflections and stray light in reflective optical systems without changing the telescope's core optics. Typical applications Astrophotography: Reduce reflection artifacts and capture clearer images of mirrors, internal reflections, and bright targets. Laboratory optics and research: Precise alignment and controlled illumination for optical experiments, component inspection, or alignment checks. Industrial inspection: Stable mounting and adjustable LED lighting for examining reflective surfaces, coatings, or small optical parts. Technical notes Constructed from quality alloy and optical glass. M42 camera thread; fits 1.25' astronomical telescope interfaces. Includes adjustable LED illuminator and durable mounting arm for alignment and stability.