Weighing in at 14.3 lbs this 5.5 inch Vixen telescope is an incredible
performer. Deep Sky objects are easily visible and Astro-Imagers looking
for a fast instrument with clear aperture will be impressed with the
NA140's performance. The advanced 4-element objective lens, set in two
groups, minimizes residual chromatic aberrations. With its unique Petzval
like correcting lens at the rear, this Neo-Achromatic telescope is
specifically designed to provide improved color and a flat field, ideal for
astrophotography.