Sky-Watcher 0.77x Reducer/Flattener for Esprit 120 - S20209 Tele Vue Eyepieces Light Gathering Power (Compared to

Light Gathering Power (Compared to human eye): 1127 x

This Explore Scientific 52° 20 mm Waterproof Argon-Purged Eyepiece provides all the comfort

Its optimum image circle is 28 mm

Tele Vue 55mm Plossl Eyepieces deliver sharper images than any other brand of 4 or 5 element "Plossl" or Orthoscopic telescope eyepiece designs

Sky-Watcher 0.77x Reducer/Flattener for Esprit 120 - S20209 Tele Vue Eyepieces Light Gathering Power (Compared toSky Watcher 0. 77x Reducer Flattener for Esprit 120 Sky Watcher 0. 77x Reducer Flattener Only for the Esprit 120 Focuser Compatible with both APS C and full frame sensors 34 mm fully illuminated field is available Also good to use for full frame cameras Provides a 95 mm back focus Or, 55 mm when back focus spacer and M48 ring installed Lowers f ratio from native f 7 (840 mm) to f 5. 4 (647 mm) Reduces exposure time by 68% compared to native f 7 3. 18