Sky-Watcher 0.77x Reducer/Flattener for Esprit 150 - S20215 Correctors The hobby of amateur astronomy

The hobby of amateur astronomy frequently takes the observer away from sources of AC power

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Gibraltar HD4 telescope mount featuring smooth alt-azimuth motions and included encoders

providing images with outstanding detail

The Celestron AstroMaster Series produce bright

Sky-Watcher 0.77x Reducer/Flattener for Esprit 150 - S20215 Correctors The hobby of amateur astronomySky Watcher 0. 77x Reducer Flattener for Esprit 150 Sky Watcher 0. 77x Reducer Flattener Only for the Esprit 150 Focuser Compatible with both APS C and full frame sensors 36 mm fully illuminated field is available Also good to use for full frame cameras Provides a 90 mm back focus Or, 55 mm when back focus spacer and M48 ring installed Lowers f ratio from native f 7 (1050 mm) to f 5. 4 (810 mm) Reduces exposure time by 68% compared to native f 7 2. 54