Tele Vue 4.5 Delos (EDL-04.5) Focusing Mask Also requires accessory shoe for

Also requires accessory shoe for mounting on telescope: For Dobsonians

and location downloads from orbiting Global Positioning Satellites

such as Radians

delivering exceptionally clean dark frames

The internal surfaces are blackened and glare-threaded to provide the highest contrast

Tele Vue 4.5 Delos (EDL-04.5) Focusing Mask Also requires accessory shoe forTeleVue is pleased to introduce the Delos, mid to short focal length line of 20mm eye relief, 72 apparent field of view eyepieces. Every optical, mechanical, and ergonomic aspect was rethought to achieve reference standard performance for any visual application. The Delos was conceived as a narrower field Ethos. Reducing the field to 72 allowed freedom to increase eye relief, while controlling pupil aberrations, all without making the eyepiece too