Apochromatic Refractor Optical Tube Vixen SD103S
A new apochromatic refractor with high-performance Super-ED (= SD) glass. The FPL53 glass reproduces an extremely clear and sharp image thanks to an exceptionally high degree of elimination of residual chromatic aberrations. The advantage of these SD refractors is their short length and low weight. The SD glass is designed so that all violet, red, blue, yellow and green beams are joined very precisely in the same plane. The special lens material reduces chromatic aberration in all colors. In combination with the new optional SD Reducer HD or SD Flattener HD kit, these refractors enable illumination with a 44 mm image circle for full-frame SLR cameras.
FEATURES
- Lens diameter: 103 mm
- Coating type Multi-coating
- Focal length: 795 mm (f7.7)
- Resolution: 1.13 arcseconds
- Visual limit value: 11.8 mag
- Maximum magnification: 206x
- Tube length: 810 mm
- Tube diameter: 115 mm
- Tube weight: 5.4 kg
- 7x50 spotting scope with illumination unit
- 7.0 degree FOV adapter included
- Connections/adapters: 60mm thread and 31.7mm T-ring thread
- Eyepiece adapter 50.8mm (2 inches) and 31.7mm (1.25 inches)
- Back focus without reducer: 150.4mm (150.4mm)
- Back focus with reducer: 63.5mm (63.5mm)
- Flip-up mirror included
wHAT IS DELIVERED?
- Optical tube
- Tube rings with carrying handle
- GP dovetail adapter
- Folding mirror
- Dust covers
Technical specifications:
OPTICAL SPECIFICATIONS
- Optical design Apocomatic refractor
- Magnification from 20
- Maximum recommended magnification 206
- ED glass ✓
- Mirror/lens diameter 103 mm
- Focal length 795 mm
- Aperture ratio 7.7
- Angular resolution 1.13 arcseconds
- Visual limiting magnitude (approx., mag) 11.8
- Coating type Full multi-coating
- Viewfinder 7 x 50 mm
GENERAL TECHNICAL DATA
- Material OTA Metal
- Color white
- Focusing system 2" Crayford focuser
- Mount type Mountless optics
DIMENSIONS AND WEIGHTS
- Overall length 810 mm
- Net weight OTA (including accessories) 5.4 kg
- Tube diameter 115 mm
Apochromatic refractor optical tube Vixen SD103S
