Sky-Watcher EVOSTAR-90 AZ3
  • Sky-Watcher EVOSTAR-90 AZ3

Sky-Watcher EvoStar 90 AZ3

The Sky-watcher EVOSTAR series are two-element, air-spaced, multi-coated objective achromatic refractors. Manufactured to extremely high standards of optical and mechanical precision

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90mm (3.5") f/900 REFRACTOR TELESCOPE 
Skywatcher supplied product information - 
With their long focal lengths and breathtaking, diffraction limited optical performance, they are ideal for the detailed high-power study of the Moon, Planetary Surfaces and other objects in our solar system, giving crisp contrast images. These telescope packages will stand you in great stead for a lifetime of serious astronomical viewing. Tube Material: Aluminium

  • Magnifications (with eyepieces supplied): x36 & x90

  • Highest Practical Power (Potential): x180

  • Objective Lens Diameter: 90mm

  • Telescope Focal Length: 900mm (f/10)

  • 6x30 Finderscope

  • 45º Erect Image Diagonal 1.25"

  • Multi-Coated Objective Lens

  • AZ3 Deluxe Alt-Azimuth Mount

  • Aluminium Tripod with Accessory Tray

  • 65% more Light Gathering than 70mm

Our view

Economic way of owning a simple non-powered small aperture alt-az casual astronomical telescope. An ideal white light solar refractor by adding some Baader Astrosolar over the front aperture. A low cost instrument for schools to purchase for science project solar observing. Can be used successfully as a terrestrial spotting scope during the day from a home with a view.


Budget for an A4 sheet of Baader Astrosolar and a weak sky pollution filter such as the Baader Neodymium 1.25 filter. Budget also for a 1.25" Baader polarizing set or a 1.25" Neutral density filter for the moon.


Data sheet

Optical Design
3.5 inch
Mount Type
Focal Length
900 mm
Focal Ratio
Optical Coatings
Multi Coated

Specific References