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Evostar-100ED DS-PRO Fluorite ED APO OTA with 0.85 Focal Reducer

Evostar-100ED DS-PRO Fluorite ED APO OTA with 0.85 Focal Reducer

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12.00 kg
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including VAT 20.00 % ( £129.83 )

Evostar-100ED DS-PRO OTA with 0.85x Focal reducer

100mm (4") F/900mm Fluorite ED Apochromatic Refractor Telescope OTA (Optical Tube Assembly) with Dual-Speed Crayford Focuser, Di-Electric Star Diagonal, Aluminium Carrying Case and 0.85x Focal Reducer! All these included for this incredible price!

The new EVOSTAR DS-PRO Series ED Apochromatic refractors in their stunning Black-Diamond livery, house premium optics of the same quality and performance level as our now legendary Equinox series, making them superb instruments for both imaging and visual observations.

Apochromatic Refractors, due to their unobstructed, text-book like diffraction patterns, produce the sharpest, highest quality optical imaging available, bar-none, aperture for aperture, of any telescope optical system.

These high-end telescopes all feature a doublet objective lens. One element is made from premium Japanese Ohara FPL-53 Extra-Low Dispersion (ED) glass, which virtually eliminates chromatic aberration to deliver true colour reproduction. Top quality Schott glass is utilized for the Crown element.

Each air-to-glass lens surface has exotic anti-reflection metallic coatings applied, to ensure optimum light through-put of approaching 99.5%!!

The proprietary Sky-Watcher “Metallic High-Transmission Coatings” (MHC) are the finest photon anti-rejection coatings in their class.

  • Objective Lens Diameter: 100mm
  • Telescope Focal Length: 900mm (f/9)
  • Highest Practical Power (Potential highest useful magnification): x300
  • 0.85x Focal Reducer/Corrector (provides f/7.65)
  • Dual-Speed 11:1 2” Crayford Focuser (Backlash-Free)
  • 2”/50.8mm Di-Electric Star Diagonal
  • Magnification with Eyepieces Supplied: x32
  • Eyepiece Supplied (2"): 28mm LET
  • 9x50 Finderscope
  • Multi-Coated Objective Lens
  • Supplied with Tube Rings & Mounting Plate
  • Aluminium Carrying Case with foam padding (please note, the case is designed to protect the telescope during shipping and is therefore offered as "free". We cannot provide replacement cases if marked or damaged, however the telescope itself is of course fully insured against any damage in transit).



PRO-SERIES is the name for the new generation of professional quality telescopes and mounts of the Sky-Watcher range, targeted at the most discerning and critical observers.

PRO-SERIES products are manufactured to extremely high levels of optical and mechanical precision, undergoing very strict quality control procedures and testing by specially assigned technicians, to ensure the highest standards of quality and performance are consistently maintained.


Premium quality, high performance telescopes for planetary and deep-sky observaions as well as astrophotography and CCD imaging. The two-element objevtive lens is fully multi-coated and utilises special, extra-low dispersion FPL-53 fluorite glass for the virtual elimination of false colour. Performance of these telescopes will both delight and surprise the most critical observer, and can be genuinely compared to Apochromatic telescopes of other brands in price brackets normally way beyond the reach of the average user.

ED Fluorite glass elements minimise chromatic aberration, provide higher resolution and superior contrast. Colour fringing around objects is virtually eliminated with this type of optics.



Related Manuals and Reviews
 ...not yet available

 Sky-Watcher ED Refractor Telescope on YouTube




World Exclusive Co-Branding Agreement with Schott

Selected high-end Sky-Watcher telescopes benefit from the inclusion of Schott glass in their construction. Schott is the recognised world leader in glass utilised for precision optical lens systems, including medical instrumentation and famous brand camera lenses. Sky-Watcher's parent company signed a worldwide exclusive telescope co-branding agreement with Schott in March 2008.

Schott glass is currently present in the EVOSTAR-ED APO Refractors, the SKYMAX-150 & 180 PRO Maksutov-Cassegrains, EQUINOX ED APO Refractors and the EXPLORER-190MN PRO Maksutov-Newtonian




Ade Ashford Says about Sky-Watcher EVOSTAR DS-PRO ED Apochromatic Refractors

"While the traditional achromatic refractor offers good correction for chromatic aberration (false prismatic colours around bright objects), the discerning observer and astrophotographer will appreciate the near-perfect optical correction provided by the EVOSTAR DS-PRO series. Not only do these instruments look stunning in their black-diamond livery, but their objectives composed of Japanese FPL-53 ED and Schott crown glass will deliver image quality to match."
Ade Ashford BSc

Ade Ashford has tested and reviewed astronomical equipment in a professional capacity for several publications, including Sky & Telescope, Astronomy Now & BBC Sky At Night Magazine. He is currently living in New Zealand and is an astronomer at Mt John Observatory, Lake Tekapo.


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