Vixen SD103SII apochromatic doublet refractor

Vixen SD103S apochromatic doublet refractor

A 103 mm apochromatic refractor with high-performance Super-ED glass (= SD). The advantage of this SD refractor is its short length and low weight.

The FPL53 glass reproduces an extremely clear and sharp image by an exceptionally high degree of elimination of residual chromatic aberrations. The SD glass lens is designed to bring all beams of violet, red, blue, yellow and green very precisely together on the same plane. The special lens material reduces chromatic aberration across all colours.

The new Vixen SD103SII no longer uses spacer plates, which leads to a significantly better image quality, especially with bright stars. In photographic images, no spikes can be seen on the stars, which were otherwise produced by the spacer plates. In addition, you will be thrilled when you look at the moon or the brighter planets and observe the moon craters pin sharp as well as with extremely high contrast. Also look at the ring planet Saturn or the cloud bands on Jupiter. But of course, brighter deep sky objects such as the Orion Nebula or the Andromeda Galaxy can also be observed in impressive detail.

In combination with the new optional SD Reducer HD Kit or SD Flattener HD, this refractor allows illumination with a 44 mm image circle for full frame format SLR cameras.

The older ED81SII, ED103S, ED115S refractors were originally developed for visual observers and photographers using APS-C cameras. However, the new SD series is also optimised for use with full-frame cameras through the use of new inner baffle rings. The large 60 mm focuser also allows heavy cameras to be attached without tilting. Furthermore, the included flip mirror allows comfortable observation even in unfavourable observation situations and additionally offers a T2 thread for connecting a DSLR camera. This allows you to observe in straight line or at a 90° angle. The carrying handle attached to the tube clamps ensures a secure grip when transporting the telescope.

FEATURES
2-lens SD apochromat without spacer plates - no more spikes on the stars
Material convex lens: S-FPL53
Coating: Full multi-coating, fully coated
Objective/lens diameter: 103 mm
Focal length: 795 mm
Focal ratio: f/7.7
Resolution: 1.13 arc seconds
Limiting magnitude: 11.8 mag
Light gathering power: approx. 217x more than the human eye
Maximum magnification: 206x
Tube length: 810 mm
Tube diameter: 115 mm
Tube weight: 5.5 kg
Finder: 7x50 with illumination unit
Connections/adapters: Thread 60 mm, adapter to 42 mm thread for T-ring
Receptacle: 50.8 mm (2 inches) and 31.7 mm (1.25 inches)
Backfocus without Reducer: 150.4 mm
Backfocus with Reducer: 63.5 mm
Flip mirror included

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with the predecessor of this telescope model: Link to Astrobin

- Optical tube with dew shield
- Tube rings with carrying handle
- GP dovetail bar
- Flip mirror
- Dust covers

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with the predecessor of this telescope model: Link to Astrobin

Safety informations: PDF Download