Product Description: 1.25" Short Collimation Eyepiece for Telescopes High-Quality Construction: This 1.25-inch short collimation eyepiece is expertly crafted from durable aluminum alloy and finished with precise CNC manufacturing. Its robust construction ensures longevity and reliability, making it an essential tool for any serious astronomer or photographer. Precision Optical Alignment: Designed specifically for calibrating the optical axis of reflector telescopes, this collimation eyepiece simplifies the alignment process. By inserting the eyepiece into the telescope tube, users can easily check and adjust the optical alignment to ensure optimal performance. Easy-to-Use Calibration: The eyepiece features a simple, intuitive design to help you achieve perfect collimation. Ensure the black spot is centered between the two lines of the collimation eyepiece. If adjustments are needed, simply tweak the screws until the black spot is precisely centered, guaranteeing accurate and sharp visual results. Versatile Accessory: This eyepiece is a valuable addition for both photography and astronomy enthusiasts. Whether capturing stunning celestial images or enjoying detailed observations, it enhances your equipment’s accuracy and clarity, allowing for a superior viewing experience. Enhance your telescope’s performance with this 1.25" short collimation eyepiece. Its high-quality construction, ease of use, and precision alignment capabilities make it an indispensable tool for achieving perfect optical calibration, ensuring you get the most out of your astronomical and photographic pursuits.