The Vixen SDP65SS is a compact astrograph with a very high imaging performance suitable for photography up to full-frame sensors
- Compact and lightweight astrograph with 65 mm aperture
- Four lens elements in four groups including SD and ED lenses
- Designed for photography up to full-format with 44 mm image circle
- Extremely low vignetting for best results in astrophotography
- Very compact with a length of approx. 413 mm and 359 mm when the dew cap is retracted
- Ideal for field use or travelling by plane
- Dovetail slide rail for Vixen Standard and Arca Swiss systems
- Newly designed focuser with lens focusing and vernier scale
- Dimensions: L: 413 mm (359 mm dew cap retracted) x D: 90 mm
- Weight: 2.6 kg
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Read nowFAQ - Frequently Asked Questions
- Alt-azimuth: easy to use, moves horizontally and vertically
- Equatorial: enables precise tracking of objects with only one axis – ideal for high magnifications and astrophotography
- Moon: from 30 mm
- Planets: from 100 mm
- Deep sky: from 150 mm
Product information "Vixen Telescope SDP65SS Astrograph"
Purpose-built for astrophotography
The SDP65SS has been purpose-built for astrophotography and features four elements made from SD glass, high-refractive-index ED glass and lanthanum glass. The arrangement of the lenses is optimised for maximum performance, significantly reducing axial chromatic aberration and achieving the same level of astigmatism correction as the VSD telescope series.
Exceptional image field flattening
The optimised arrangement of the four lenses made from SD and ED glass achieves an exceptionally flat image plane without the need for an additional flattening lens. It provides a high degree of correction and produces distortion-free star images across the entire 44 mm illuminated field of view.
To reduce vignetting, the light beam is narrowed at the final lens element.
Thanks to the optical design, vignetting is virtually eliminated, ensuring excellent edge illumination with almost any camera system. Over 90% of the light is captured at the edge of a 35 mm full-frame sensor, reducing the need for extensive image processing afterwards.
Newly designed focuser
Focusing is achieved via a rack-and-pinion system that moves the lens assembly forwards and backwards. As the focuser body itself remains stationary, there is no tilting, even when using heavy accessories or cameras. A built-in vernier scale provides a clear reference for focus position, marked in 0.1 mm increments. For even greater precision, an optional dual-speed focuser or a third-party ZWO EAF (electronic focuser) can be attached.
Compact and lightweight
Measuring approximately 413 mm in length, or 359 mm with the dew cap retracted, the telescope is exceptionally portable—perfect for travel and field use.
With the optional SDP Focal Reducer 0.8x, the SDP65SS can capture images with a wider field of view and shorter exposure times. The focal length is reduced by a factor of 0.8, and the focal ratio decreases from f/5.5 to f/4.4.
FEATURES
- Lens design: 4-group 4-element SD (Super ED) apochromat, multi-coated
- Aperture: 65 mm
- Focal length: 360 mm (F5.5)
- Resolving power: 1.78 arc seconds
- Limiting magnitude: 10.8
- Light-gathering power: 86x
- Illumination: 44 mm to over 90% in the image corners
- Tube length / diameter: 413 mm (359 mm dew cap retracted) / 90 mm
- Eyepiece focuser: Internal focusing, rack-and-pinion with scale
- Adapter thread: 60 mm (P=0.75 mm), 42 mm for T-ring
- Visual back: 31.7 mm connection
- Solar observation: For solar observation, a solar projection screen set B and an eyepiece are required (not included)
- Weight: 2.6 kg
SCOPE OF DELIVERY
- Vixen SDP65SS
- Dovetail slide bar
- 1/4 inch screws (L: 19 mm) x 2 pieces,
- Allen key (3 mm, 2 mm, 1.5 mm, 3/16 inch)
| Angular resolution (arc seconds): | 1.78 |
|---|---|
| Aperture ratio: | 5.5 |
| Batteries included: | false |
| Batteries required: | false |
| Colour: | white |
| Compass: | false |
| Dust protection caps: | Dust protection caps for front lens and eyepiece holder |
| ED glass: | true |
| Field of application [Telescopes]: | Deep Sky Observation, Deep Sky Photography, Lunar observation, Lunar photography, Planetary observation, Planetary photography |
| Focal length (mm): | 360 |
| Length with retracted tube (approx., mm): | 359 |
| Material: | Aluminium |
| Material OTA: | Aluminium |
| Material front lens or corrector plate: | Ohara Japan FPL-53 ED glass |
| Maximum recommended magnification: | 130 |
| Mirror/Lens diam. (mm): | 65 |
| Net weight OTA (incl. accessories) (kg): | 2.6 |
| Optical design: | Apochomatic Refractor |
| Power supply unit included: | false |
| Product Family [Telescopes]: | Refractor telescope |
| Reticle: | false |
| Target Group [Telescopes]: | Advanced Amateurs, Specialists and Research, Visual enthusiasts |
| Total length (mm): | 413 |
| Total width (mm): | 90 |
| Transportability: | very good |
| Tripod height adjustment: | false |
| Tube diameter (mm): | 90 |
| Type of coating: | Multi coated |
| Visual limiting magnitude (approx., mag): | 10.8 |