Product Description: 80mm Rack & Pinion Telescope Focuser Enhance your astronomical observations with our 80mm Rack & Pinion Telescope Focuser, a vital accessory designed for both Newtonian reflectors and DIY refractor telescopes. This focuser offers precision, stability, and durability, making it an excellent choice for amateur astronomers and DIY telescope builders. Explore its outstanding features: Fine Tuning Precision: Equipped with a fine-tuning gear, this focuser allows precise adjustments to the focal length, enhancing observation accuracy. Designed for telescopes with an 80mm aperture and a focusing length of 120mm, it is compatible with 1.25-inch eyepieces. Ensures smooth and stable observations, even at high magnifications, providing clear and sharp images. Secure Locking Screw: Features a secure locking screw on the side to firmly hold the eyepiece in place. Prevents any movement or slipping during observations, ensuring a steady and uninterrupted viewing experience. Internal Anti-Reflection Design: The interior of the focuser is fully threaded to minimize reflections, maximizing image quality and brightness. This design feature enhances the clarity of your astronomical observations by reducing unwanted light interference. Easy Installation and Operation: User-friendly design allows for convenient installation and operation, making it suitable for smooth focusing on reflector telescopes. Ideal for both beginners and experienced astronomers looking for efficient and straightforward setup. Versatile and Durable: Suitable for use with DIY refractor telescopes, offering flexibility for various telescope projects. Constructed from durable ABS plastic, ensuring a longer lifespan and reliable performance over time. Upgrade your telescope with the 80mm Rack & Pinion Telescope Focuser and enjoy enhanced precision and stability in your stargazing adventures. Its robust design and exceptional functionality make it a must-have accessory for anyone passionate about exploring the night sky.