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Sharpstar 71SDQ F/6.3 compact quadruplet apochromatic refractor with FPL-53 optics




The Sharpstar 71SDQ F/6.3 apochromatic refractor is a FPL-53 quadruplet with 71 mm lens diameter and 450 mm focal length designed for astrophotography with corrected and illuminated circle up to full-frame. This telescope features a 2.5" sturdy rack and pinion focuser with 360° rotation and 1:10 microfocuser, 2" and 1.25" adapter included. Telescope comes with sliding dew-shield, CNC rings and Vixen/GP dovetail plate.


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799,00 €

-100,00 €

899,00 €

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Sharpstar 71SDQ F/6.3 compact quadruplet apochromatic refractor with FPL-53 optics

The Sharpstar 71SDQ F/6.3 features a quadruplet oblective lens with 71 mm diameter and 450 mm focal length. It is a pure astrograph with a corrected an illuminated field up to the full-frame format (24x36 mm). Optical design consists in an air-spaced quadruplet apochromat with japanese Ohara S-FPL53 lens delivering very high color correction. Each optical surface is fully multi-coated with a high light-transmission coating.

It an instrument specifically designed for deep-sky imaging, with a special care for compactness (length of only 350 mm) and portability (only 2,5 Kg rings and Vixen dovetail included). Focal ratio of F/6.3 is somewhat fast, short focal length and big corrected field of view suggest the use of DSLR or CCD/CMOS cameras. Given the focal length og 450 mm we highly suggest the use of cooled CMOS cameras such as ASI1600MM-Pro and QHY163M, ASI294MC-Pro and QHY294C, ASI071MC Pro and QHY168C, etc.

Even if the this instruments has been designed for astrophotography, the Sharpstar 71SDQ F/6.3 delivers good performances also on visual observations thanks to the very good color correction and optical quality.

The telescope features an oversized 2.5" rack & pinion focuser with 1:10 micro-focuser. 2" and 1.25" adapter are included. It allows for 360° full rotation for perfect framing. Focuser shows also a M63x1 male thread where you can screw directly optional wide adapters designed to keep sensor axiality and minimize vignetting.

Mechanical quality of this Sharpstar 71SDQ is top-notch: OTA is made with CNC machined light aluminium alloys, light and sturdy. Focuser is of very good quality. Even experienced customers will appreciate quality of this instruments. Nothing is left to chance!

Technical data

  • Optical design: air-spaced apochromatic triplet with japanese Ohara S-FPL53 central lens and menuscus field corrector permanently mounted into optical tube.
  • Aperture: 71 mm
  • Focal length: 450 mm
  • Focal ratio: F/6.3
  • Coating: yes, Fully Multi-Coated
  • Resolving power: 1.69"
  • Limit magnitude: 11
  • OTA length: 350-380 mm
  • Outer tube diameter: 80 mm
  • OTA made of light aluminium alloys, CNC machined
  • Backfocus: 115 mm from 2" attachment, 125 mm from male M63x1 thread.
  • Weight: 2.15 Kg OTA only - 2.5 Kg with rings and Vixen/GP dovetail

Scope of delivery

  • 2.5" focuser with M63x1 male thread and 2" and 1.25" reductions. 1:10 micro-focuser and 360° rotation.
  • Retractible dewshield
  • Finder shoe compatible with Vixen, Skywatcher, ...
  • 80 mm CNC rings
  • Vixen/GP dovetail plate

Optical and mechanical check before delivery

Sharpstar inspects any instrument with their interpherometer in order to deliver the highest quality possible. Any optics sold by Skypoint is thouroughly tested with our optical bench. Testing includes also a deep mechanical check so that you will be sure to get a perfectly collimated instrument without mechanical defects that may occurs during import from China.

Skypoint, thanks to his pluriannual expertize, can assis you to complete your setup. We are also able to design and manufacture high-precision mechanical adapters for your CCD or CMOS camera. Contact us for info!


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