Sky-Watcher 0.77x Reducer/Flattener for Esprit 120 - S20209 Tele Vue Eyepieces Its optimum image circle is

Its optimum image circle is 28 mm

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

This Internal Double Stack Module from Lunt Solar can be added to an existing LS152THa Lunt Ha telescope

Sensitivity:

Sky-Watcher 0.77x Reducer/Flattener for Esprit 120 - S20209 Tele Vue Eyepieces Its optimum image circle isSky 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