This 1.25 inch UHC filter is designed to improve the contrast of observed objects by reducing light pollution. It uses precisely polished substrates with tight surface accuracy and parallelism, and is housed in a durable shell that simply attaches to a standard 1.25 inch eyepiece. Key benefits Enhances image contrast by blocking undesired broadspectrum light while preserving the emission nebula signal Significantly reduces skyglow for clearer views in city and suburban skies Simple installation: fits standard 1.25 inch eyepieces and is protected by a sturdy shell Built for durability and longterm use with precise optical construction Why customers need it See fainter deep sky objects more clearly in light polluted conditions Improve visibility of emission nebulae and related targets without added complexity Quick, reliable upgrade that preserves eyepiece compatibility and mounting ease Specifications and features Diameter: 1.25 inch Filter type: contrast UHC filter Substrate: precisely polished with good surface precision and parallelism Housing: solid, durable shell for protection and ease of use Compatibility: designed for standard 1.25 inch eyepieces Use scenarios City or suburban night sky viewing: reduce skyglow and boost contrast to reveal emission nebulae and other faint objects Backyard observing sessions: quick filter swap to improve object visibility without changing setup Educational or outreach events: simple attachment to demonstrate the impact of light pollution on visibility and the benefit of filtering How to use Attach the filter to the 1.25 inch eyepiece of your scope or finder Observe through the eyepiece to enjoy improved contrast and reduced glare on target objects This filter delivers practical contrast enhancement through precise optics and a robust construction, offering straightforward improvements to visual astronomy in lessthanideal skies.