Enhance your astronomical observations with this high-quality Double Helical Focuser, expertly crafted from durable aluminum alloy for superior strength and corrosion resistance. Designed to provide smooth, precise focusing, this focuser is an ideal accessory for telescopes or telephoto lenses experiencing sluggish focusing, ensuring clearer and more accurate images. Key Features: · Premium Aluminum Alloy Construction: Offers high strength, excellent corrosion resistance, and long-lasting durability to withstand regular use in various conditions. · Lightweight and Compact Design: Weighing approximately 120g with a small footprint, this focuser is easy to carry and convenient to install on your telescope or telephoto lens. · High Precision Double Helical Mechanism: Provides a smooth, linear focusing motion with an accuracy of approximately 0.05mm, minimizing eyepiece rotation to enhance observation and astrophotography stability. · Optimal Focusing Stroke: Features a 10mm (0.4 inch) focusing stroke, allowing for fine adjustments to achieve sharp focus effortlessly. · Versatile Interface Compatibility: Equipped with a 1.25-inch interface and inner M42*0.75mm thread, making it compatible with a wide range of finder scopes, guider scopes, and astronomical equipment. · Ideal for Astronomical Telescopes: Perfectly suited as an upgrade or replacement focuser to improve the focusing performance of your telescope setup. Specifications: · Item Type: Double Helical Focuser · Condition: 100% Brand New · Material: Aluminum Alloy · Weight: Approx. 120g · Color: As shown in the picture · Focusing Stroke: Approx. 10mm (0.4 inches) · Focusing Accuracy: Approx. 0.05mm · Interface: 1.25 inches with inner M42*0.75mm thread Package Includes: · 1 x Double Helical Focuser This Double Helical Focuser delivers precise and reliable focusing performance with smooth, no-rotation linear motion, making it an excellent choice for astronomy enthusiasts seeking enhanced clarity and ease of use during observations and astrophotography sessions.