The 2011 Sky-Watcher Equinox 100 ED 4 in f/9 refractor is my first telescope and used 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.
Modified Sky-Watcher Equinox 100ED at f/5.57 (100 mm aperture, 557 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.
The telescope has undergone various modifications including the installation of a DIY reducer, making the telescope shorter and faster (from f/9 to currently at f/5.57) and also reducing the tube length to about 55 cm. The effective focal length is now 557 mm (from the native 900 mm). When used with a Hotech 2 inch field flattener, the effective focal length is 554 mm.
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Sample corrected (flat) image taken with the modified Sky-Watcher Equinox 100ED
View all images taken with the Sky-Watcher Equinox 100ED
Night Sky in Focus © Anthony Urbano | Bacoor, Philippines
Night Sky in Focus 