The newly designed high definition ED lens in Vixen's ED103S gives excellent optical performance in a short optical tube for easy handling.

The new lenses feature brighter images from the f7.7 focal ratio and capture crisp, pinpoint star images. Vixen’s ED glass produces clear and high contrast viewing, virtually free of false colour.

Vixen’s new optical system focuses the full visible spectrum of light to a critical point much more accurately than earlier models resulting in images that are almost free of chromatic aberration in all colours and are sharp edge to edge.

Offering a larger aperture than the ED81S, this tube offers 217x light gathering power and is supplied with dual speed focuser tube rings and dovetail mounting plate.