Vixen SD103S OTA ES26147 — 103 mm SD Apochromatic Refractor Optical Tube Assembly

The Vixen SD103S OTA ES26147 is a high-performance 103 mm SD‑glass apochromatic refractor optical tube, designed for serious visual astronomy and astrophotography. With a fast 795 mm focal length (f/7.7), it delivers wide-field, sharp, high-contrast views — perfect for deep-sky objects as well as detailed lunar and planetary observation.

Thanks to its SD apochromat optics and multicoated lens, the SD103S OTA minimizes chromatic aberration and maximizes light transmission, producing crisp, true‑color images. Its versatile design supports both 2″ and 1.25″ eyepieces, and the drawtube includes threads for T‑ring and camera mounts — making it ready for prime‑focus or afocal astrophotography with the appropriate adapters.

The package includes essential accessories: dovetail mounting plate, tube rings with carry handle, flip‑mirror diagonal, and a 7×50 mm illuminated finder, ensuring the tube is ready for mounting and use on a compatible mount.

Features & Benefits

• 103 mm SD‑glass apochromatic objective — Sharp, high-contrast images with minimal chromatic aberration.

• Fast, versatile 795 mm f/7.7 optics — Suitable for wide-field deep-sky viewing and detailed planetary or lunar observing.

• Flexible eyepiece & imaging compatibility — Supports 2″ and 1.25″ eyepieces; drawtube threads for T‑ring or camera mount for astrophotography.

• Accessories included — Comes with dovetail plate, tube rings with carry handle, flip‑mirror diagonal, and 7×50 mm illuminated finder.

• Great light‑gathering power — Light-gathering ~ 217× naked eye, enabling bright views of deep-sky objects.

• Robust build & usability — Well-balanced optical tube, easy to mount on a variety of mounts thanks to dovetail system and accessories.

Specifications