Sky-Watcher Equinox 100 ED

The 2011 Sky-Watcher Equinox 100 ED 4 in f/9 refractor serves as one of my main telescopes both for visual observation and astrophotography. The Optical Tube Assembly (OTA) features a 4-in f/9 extra-low dispersion (ED) apochromatic (APO) lens design.

Sky-Watcher Equinox 100ED at f/6.28 (100 mm aperture, 628 mm focal length)

It has a 2-inch dual-speed Crayford focuser with a thumbscrew underneath for locking the draw tube. The telescope comes with aluminum-lined wooden carrying case. It is supplied with two eyepieces: 25 mm and 5 mm. Supplied also is a 90-degree 2-inch diagonal mirror and an 8 by 50 finder scope.

Modified Sky-Watcher Equinox 100ED on an improvised telescope hard case.

In 2021, the telescope has been modified and fitted with a DIY reducer, making the telescope shorter and faster (from f/9 to currently at f/6.28, 0.7x ) and also reducing the tube length by 20 cm.

Orion Nebula imaged with a focal reducer at 100 mm aperture, 680 mm focal length (f/6.28)

Related link: Vixen R114 Newtonian Reflector

Night Sky in Focus 
© Anthony Urbano | Bacoor, Philippines

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