Sky-Watcher 0.77x Reducer/Flattener for Esprit 150 - S20215 Correctors 105mm of back focus: Provides

105mm of back focus: Provides generous back focus to accommodate additional accessories and a wide variety of cameras

Antares Model No: SW17S3 Barrel Diameter: 1

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

Including all the needed spacers and adapters are included for most common imaging configurations

The 30 mm Ultima Edge eyepiece features fully multi-coated optics and a 9-element lens design

Sky-Watcher 0.77x Reducer/Flattener for Esprit 150 - S20215 Correctors 105mm of back focus: ProvidesSky 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