Features: The 1.25 inch UHC telescope filter was designed to improve the image contrast of observed objects. This filter is perfect for observation low-contrast deep-sky objects. These features make it perfect for observing nebulae and other deep-sky objects. Produce sharp and clear images, this filter is considered one of the most popular astronomy accessories. Significantly reduces light pollution, great for city and suburban observation. Specification: Condition: Brand New Frame Material: Aluminium Alloy Lens Material: Optical Glass Type: High Contrast Filter (UHC Filter) Shell Color: Black Barrel Diameter: 31.7mm / 1.25in Thread: Standard M28*0.6mm Weight: Approx. 27g Package List: 1 * UHC Filter 1 * Storage Case Package List 1The 1.25 inch UHC telescope filter was designed to improve the image contrast of observed objects. 2This filter is perfect for observation low-contrast deep-sky objects. 3These features make it perfect for observing nebulae and other deep-sky objects. 4Produce sharp and clear images, this filter is considered one of the most popular astronomy accessories. 5Significantly reduces light pollution, great for city and suburban observation.