Tele Vue 3.5mm Delos Eyepiece - 1.25" - EDL-03.5 14mm Eyepieces the Etalon filter systems have

the Etalon filter systems have to be adjusted to the prevailing air pressure at the observation location

flat-field

Any movement seen by the guide star will be the exact same movement seen by the imaging camera

Celestron 8-24mm Zoom Eyepiece - 1

Tele Vue 3.5mm Delos Eyepiece - 1.25" - EDL-03.5 14mm Eyepieces the Etalon filter systems haveAbout the Tele Vue 3. 5mm Delos Eyepiece 1. 25" Tele Vue is pleased to introduce the TeleVue Delos Eyepiece, a mid to short focal length line of 20mm eye relief, 72 degree apparent field of view eyepieces. Every optical, mechanical, and ergonomic aspect was rethought to achieve reference standard performance for any visual application. The TeleVue Delos Eyepiece was conceived as a narrower field Ethos. Reducing the field to 72 degrees allowed freedom