The AX103S is the latest in the Vixen refractor line and features a triplet objective lens and a rear field flattener lens.
This f8.0 APO refractor benefits from a central ED lens in the objective lens array to reduce chromatic aberration and improve contrast.
The rear field flattener helps to deliver sharp images to the edges of the field of view.
Light gathering power is 217x and the tube is supplied with dual speed focuser, dovetail mounting