Orion 2" V-Block Anti-Fringing Telescope Filter

The Orion 2" V-Block Anti-Fringing Telescope Filter effectively removes the distracting color halos from around bright objects, greatly improving image sharpness, color, contrast and resolution. The V-Block works amazingly well with achromatic refractors of any aperture or focal length. Its sophisticated coatings selectively block wavelengths in the violet and blue (< 450nm) end of the visible spectrum, while allowing up to 95% transmission of the other wavelengths.

And you will find that you can push the magnification higher with the filter than without it because of the improved image definition. Objects also snap into focus more readily now that the fuzzy blue-violet fringe is attenuated. This 2" V-Block is a glass filter encased in an anodized aluminum cell. It threads into eyepieces, diagonals and barlow lenses threaded to accept 2" filters. Effective for visual use as well as CCD or film imaging. It comes with protective plastic case.