1.25" Orion V-Block Anti-Fringe Eyepiece Filter

V-Block filter effectively removes the distracting color halos from around bright objectsImage sharpness, color, contrast, and resolution are greatly improved when using a V-Block filter1.25" eyepiece filter helps to improve view quality when observing bright celestial objectsIncludes hard plastic protective filter caseRecommended for use with refractor telescopes
Product DescriptionWith refractors, it's normal to see some purple fringing or halos around bright objects such as the planets,

Source: Digital Camera and Video Store...