Enhance your optical instruments with the YZ-18839 Helical Focuser, designed for precision and durability. Crafted from high-quality aluminum alloy, this focuser offers a sturdy build with a smooth, premium hand feel. Its compact and lightweight design makes it easy to carry and store, providing convenience for both amateur and professional users. Key Features: · High-Precision Focusing: Achieve ultra-fine adjustments with a 0.05mm accuracy and a 10mm (0.39 inch) focusing stroke, ensuring sharp, clear views for your observations. · Durable Aluminum Alloy Construction: Made from premium aluminum alloy, this focuser is robust, wear-resistant, and built to last. · Compact and Lightweight: Weighing approximately 119g, it is easy to handle, transport, and store without compromising performance. · Professional Quality: Manufactured with precision to deliver stable characteristics and high reliability for consistent performance. · Standard Thread Size: Equipped with an M28.5*0.6 thread, compatible with a wide range of optical equipment. Specifications: · Item Type: Helical Focuser · Model: YZ-18839 · Material: Aluminum Alloy · Color: As pictured · Thread: M28.5*0.6 · Focusing Stroke: Approx. 10mm (0.39 inch) · Accuracy: 0.05mm · Weight: Approx. 119g Package Includes: · 1 x YZ-18839 Helical Focuser This YZ-18839 Helical Focuser is the perfect accessory for precision optical adjustments, combining high accuracy, robust construction, and ease of use to enhance your viewing experience. Ideal for telescopes, microscopes, and other precision optical instruments.