Tele Vue Dioptrx 0.50 Astigmatism Corrector - DRX-0050 Tele Vue Then here you go

Then here you go

Focal Length: 20mm

25" telescope eyepieces

56 mm objective lenses

you may even forget that you have an eyepiece between you and the universe

Tele Vue Dioptrx 0.50 Astigmatism Corrector - DRX-0050 Tele Vue Then here you goTeleVue Dioptrx 0. 50 Astigmatism Corrector for TeleVue Eyepieces Got astigmatism? Get the "cure" Your telescope's focuser is used to compensate for your near or far sightedness; TeleVue Dioptrx compensates for your astigmatism. These units attach and lock onto the tops of over 20 long eye relief Tele Vue eyepieces to achieve the sharpest full field viewing possible. TeleVue Dioptrx models are available in . 25 to 3. 25 diopter (1 4 steps from . 25 to