Vixen AX103S Apochromatic ED Quad Element Refractor, 103mm Aperture, 825mm Focal Length, Multi Coating

The Vixen Optics Ax103S Apochromatic ED Quad Element f/8.0 Refractor features a three element objective lens, incorporating a central ED lens. This reduces chromatic aberration and yields high contrast images. In combination with the rear Field Corrector Lens, the Ax103 Refractor yields clear images to the edges of the field of view.

The built-in Dual Speed Focuser enables coarse and fine focus adjustments. The chromatic aberration on the visible spectrum and spot diagrams provide exceptional color correction and crisp sharp images. Star images are less than 20 microns on the edge of the imaging field. Vixen's "Precision Multi-Coating" is applied to every lens surface and assures extremely high light transmission.