Tele Vue 17.3mm Delos vs Tele Vue 21mm Ethos: specs compared
Updated 05 September 2026.
5
specs differ
Tele Vue 17.3mm Delos and Tele Vue 21mm Ethos differ on 5 specs: focal length, apparent field of view, barrel size, eye relief, optical design.
| Spec | Tele Vue 17.3mm Delos | Tele Vue 21mm Ethos |
|---|---|---|
| Focal length | 17.3 mm | 21 mm |
| Apparent field of view | 72 degrees | 100 degrees |
| Barrel size | 1.25 in | 2 in |
| Eye relief | 20 mm | 15 mm |
| Optical design | Delos | Ethos |
Questions and answers
How do Tele Vue 17.3mm Delos and Tele Vue 21mm Ethos compare?
Tele Vue 17.3mm Delos and Tele Vue 21mm Ethos differ on 5 specs: focal length, apparent field of view, barrel size, eye relief, optical design.