Owner manual
Tele Vue recommends choosing low and medium power eyepieces in ratios of field stop diameters. For
example, factors of 1.4 or 2.0. When choosing higher power eyepieces, use ratios of magnification.
NOTE: True Field in degrees = (Field Stop dia./Telescope Focal Length) X 57.3° *Indicates additional Dioptrx Adapter required
Tele Vue-NP127is
Focal
Length
(mm)
Type Product Code
Apparent
Field (deg)
Field Stop Dia.
(mm)
Eye Relief
(mm)
Weight
(lb.)
Mag.
True
Field
(deg)
Exit
Pupil
(mm)
# of
Elem.
Dioptrx
Ready
2" Eyepieces for Wide True Fields
55 Plössl EPL-55.0 50 46.0 38 1.1 12.0 3.99 10.6 4 Y
41 Panoptic EPO-41.0 68 46.0 27 2.1 16.1 3.99 7.9 6 Y
31 Nagler 5 EN5-31.0 82 42.0 19 2.2 21.3 3.65 6.0 6 Y
35 Panoptic EPO-35.0 68 38.7 24 1.6 18.9 3.36 6.7 6 Y
21 Ethos ETH-21.0 100 36.2 15 2.3 31.4 3.14 4.0 - Y
26 Nagler 5 EN5-26.0 82 35.0 16 1.6 25.4 3.04 5.0 6 Y
22 Nagler 4 EN4-22.0 82 31.1 19 1.5 30.0 2.70 4.2 7 Y
27 Panoptic EPO-27.0 68 30.5 19 1.0 24.4 2.65 5.2 6 Y
17 Ethos ETH-17.0 100 29.6 15 1.6 38.8 2.57 3.3 - Y
20 Nagler 5 EN5-20.0 82 27.4 12 1.0 33.0 2.38 3.8 6 Y*
17 Nagler 4 EN4-17.0 82 24.3 17 1.6 38.8 2.11 3.3 7 Y
1¼" Eyepieces for Wide True Fields
40 Plössl EPL-40.0 43 27.0 28 0.4 16.5 2.34 7.7 4 Y
32 Plössl EPL-32.0 50 27.0 22 0.4 20.6 2.34 6.2 4 Y
24 Panoptic EPO-24.0 68 27.0 15 0.5 27.5 2.34 4.6 6 Y*
13 Ethos ETH-13.0 100 22.3 15 1.3 50.8 1.94 2.5 - Y
16 Nagler 5 EN5-16.0 82 22.1 10 0.4 41.3 1.92 3.1 6 N
19 Panoptic EPO-19.0 68 21.3 13 0.4 34.7 1.85 3.7 6 Y*
25 Plössl EAP-25.0 50 21.2 17 0.3 26.4 1.84 4.8 4 N
17.3 Delos EDL-17.3 72 21.2 20 0.9 38.2 1.84 3.3 - Y
10 Ethos ETH-10.0 100 17.7 15 1.1 66.0 1.54 1.9 - Y
13 Nagler 6 EN6-13.0 82 17.6 12 0.4 50.8 1.53 2.5 7 Y*
14 Delos EDL-14.0 72 17.3 20 0.9 47.1 1.50 2.7 - Y
20 Plössl EAP-20.0 50 17.1 14 0.2 33.0 1.48 3.8 4 N
12 Nagler 4 EN4-12.0 82 17.1 17 1.0 55.0 1.48 2.3 6 Y
1¼" Eyepieces for Medium Powers
12 Delos EDL-12.0 72 15.0 20 0.9 55.0 1.30 2.3 - Y
11 Nagler 6 EN6-11.0 82 14.9 12 0.4 60.0 1.29 2.1 7 Y*
10 Delos EDL-10.0 72 12.7 20 0.9 66.0 1.10 1.9 - Y
15 Plössl EAP-15.0 50 12.6 10 0.2 44.0 1.09 2.9 4 N
9 Nagler 6 EN6-09.0 82 12.4 12 0.4 73.3 1.08 1.7 7 Y*
11 Plössl EAP-11.0 50 9.1 8 0.1 60.0 0.79 2.1 4 N
1¼" Eyepieces for Higher Powers
8 Ethos ETH-08.0 100 13.9 15 1.0 82.5 1.21 1.5 - Y
6 Ethos ETH-06.0 100 10.4 15 1.0 110.0 0.90 1.2 - Y
8 Delos EDL-08.0 72 9.9 20 1.0 82.5 0.86 1.5 - Y
7 Nagler 6 EN6-07.0 82 9.7 12 0.5 94.3 0.84 1.3 7 Y*
4.7 Ethos SX ETH-04.7 110 8.9 15 1.3 140.4 0.78 0.9 - Y
6 Delos EDL-06.0 72 7.6 20 1.0 110.0 0.66 1.2 - Y
3.7 Ethos SX ETH-03.7 110 7.0 15 1.1 178.4 0.61 0.7 - Y
5 Nagler 6 EN6-05.0 82 7.0 12 0.5 132.0 0.61 1.0 7 Y*
8 Plössl EAP-08.0 50 6.5 6 0.1 82.5 0.56 1.5 4 N
4.5 Delos EDL-04.5 72 5.6 20 1.1 146.7 0.49 0.9 - Y
3.5 Nagler 6 EN6-03.5 82 4.8 12 0.5 188.6 0.42 0.7 7 Y*
3.5 Delos EDL-03.5 72 4.4 20 1.1 188.6 0.38 0.7 - Y
2.5 Nagler 6 EN6-02.5 82 3.4 12 0.5 264.0 0.30 0.5 7 Y*
1¼" Zoom Eyepieces for Medium and Higher Powers
6-3 Nagler Zoom ENZ-0306 50 5.1-2.6 10 0.3
110.0-
220.0
0.44-
0.23
1.2-
0.6
5 N
4-2 Nagler Zoom ENZ-0204 50 3.3-1.7 10 0.4
165.0-
330.0
0.29-
0.15
0.8-
0.4
5 N