Sky-Watcher 0.77x Reducer/Flattener for Esprit 150 - S20215 Correctors Antares Model No: SW17S3 Barrel

Antares Model No: SW17S3 Barrel Diameter: 1

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a significantly wider field than that of most of it's rivals

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

Sky-Watcher 0.77x Reducer/Flattener for Esprit 150 - S20215 Correctors Antares Model No: SW17S3 BarrelSky 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