Tele Vue 13mm Ethos Eyepiece - 1.25"/2
| Article number: | ETH-13.0 |
| Availability: | More on the Way to us |
| Delivery time: | More on the Way to us |
| 13-mm | |
| Model # | ETH-13.0 |
| Focal Length (mm) | 13 |
| Barrel Size (in.) | 2" & 1¼" |
| Apparent Field of View (deg.) | 100 |
| Eye Relief (mm) | 15 |
| Weight (lb / oz) | 1.30 / 20.8 |
| Field Stop (mm) | 22.3 |
“Absolutely amazing contrast. This eyepiece takes visual observing to the next dimension.”
—G.S., ON
We have not specifically endorsed the 13mm Ethos for Bino-Vue use because of the large diameter barrel. Even so, we were advised by Mike Harvey at the Winter Star Party (February 2008) that only 1-person in 25 had interpupilary limits with the bino'd Ethos (63.5-mm for the initial production 13mm).
However, since many of our customers have been thrilled with the experience, we have maximized the potential use by narrowing the barrel from 63.5-mm to 62-mm diameter for eyepieces delivered beginning mid-March 2008. While the difference is only 1.5-mm, (or 0.75-mm for pairing a first production unit with current production) we decided to make this small change public, in case you want to give it a try.