Astronomy Specialist


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The Skywatcher Evostar 100ED is an apochromatic doublet that offers high performance for visual observers and astrophotographers. The objective lens features an element made by FLP 53 Ohara (Japan), the finest extra-low dispersion glass (ED) that minimizes the chromatic aberration for the best colour correction. As a result, planets and the moon are sharp at high magnification and for astrophotography the images have a high contrast. 

The 2" Crayford focuser is solid, precise and backlash free. It operates at two speeds due to the 10:1 reduction mechanism for an extra fine focusing adjustment, which is paramount for astrophotography and high resolution observations.

The objective lens is fully multi coated with the Skywatcher proprietary "Metallic High-Transmission Coating" (MHC) for an effective anti-reflection result that approaches a transmission of 99.5%.

The aluminium tube is light-baffled and blackened to ensure high contrast absorbing stray light.



Optical design

Apochromatic doublet FLP 53

Objective diameter

100 mm

Focal length

900 mm

Focal ratio


Resolving power

1.2 arc second

Stellar limit magnitude


Max. magnification

200 x

Light gathering power

204 times the human eye

Mount attachment

Tube rings on Vixen bar


Crayford dual speed (10:1)

Tube weight

3 kg

Tube length

920 mm

Tube diameter

100 mm





  • Evostar 100ED with dual speed focuser
  • 2" mirror diagonal (90°)
  • 2" to 1.25" adapter for the diagonal
  • 2" to 1.25" adapter with M42 thread 
  • 8x50 finderscope with fast release bracket
  • Eyepiece LET 28 mm
  • Tube rings with Vixen style bar
  • Piggyback 1/4" screw with camera locking nut
  • Foam-lined aluminium carrying case
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