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Sharpstar 86SQ F/5.4 quadruplet apochromatic refractor with FCD-100 optics




The Sharpstar 86SQ F/5.4 apochromatic refractor is a FCD-100 Petzval quadruplet with 86 mm lens diameter and 464 mm focal length designed for astrophotography with corrected and illuminated image circle up to 60 mm. This telescope features a 3.5" 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, Vixen/GP dovetail plate and transport case.


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1 789,00 €

-110,00 €

1 899,00 €

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Sharpstar 86SQ F/5.4 quadruplet apochromatic refractor with FCD-100 optics

The Sharpstar 86SQ F/5.4 features a Petzval quadruplet oblective lens with 86 mm diameter and 464 mm focal length. It is a pure astrograph with a corrected an illuminated image circle up to 60 mm, perfect for full-frame cameras or even larger. Optical design consists in an air-spaced quadruplet apochromat with Petzval scheme (2 + 2) with Hoya FCD-100 lenses, one on the front doublet and one in the rear corrective lens group) 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 430 mm with focuser all racked in) and portability (4,5 Kg with rings and Vixen dovetail included). Focal ratio of F/5.4 is pretty fast, the short focal length and big corrected field of view suggest the use of large DSLR or CCD/CMOS cameras. Given the focal length of 464 mm and big corrected image circle we highly suggest the use of cooled CMOS cameras such as ASI071MC Pro and QHY168C, ASI128MC Pro and QHY128C, etc. for impressive wide-field panoramas.

Even if the instrument has been designed for astrophotography, the Sharpstar 86SQ F/5.4 delivers good performances also on visual observations thanks to the very good color correction and optical quality.

The telescope features an oversized 3.5" rack & pinion focuser with 1:10 micro-focuser. 2" and 1.25" adapter are included. It allows for 360° full rotation thanks to a removable camera rotator. There is also a tip-tilt flange for perfect focal frame adjustment, a feature particularly appreciated among large camera owners. At the end of this flange there is a M82x1 male thread where you can screw directly optional wide adapters designed to minimize vignetting.

Mechanical quality of this Sharpstar 86SQ 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 Petzval apochromatic system (2 + 2) with FCD-100 lenses (one in the front doublet and one in the rear corrective group) permanently mounted into optical tube.
  • Aperture: 86 mm
  • Focal length: 464 mm
  • Focal ratio: F/5.4
  • Coating: yes, Fully Multi-Coated
  • OTA length: 430-490 mm
  • Outer tube diameter: 100 mm
  • OTA made of light aluminium alloys, CNC machined
  • Backfocus: 95 mm from 2" attachment, 140mm from male M82x1 thread.
  • Weight: 3.95 Kg OTA only - 4.5 Kg with rings and Vixen/GP dovetail - 8.35 Kg with case included

Scope of delivery

  • 3.5" focuser with M82x1 male thread and 2" and 1.25" reductions. 1:10 micro-focuser and 360° rotation.
  • Retractible dewshield
  • Finder shoe compatible with Vixen, Skywatcher, ...
  • 100 mm CNC rings
  • Vixen/GP dovetail plate
  • Transport case

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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