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Tele Vue Eyepiece Specifications
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TeleVue.com: Advice Article List > Tele Vue Eyepiece Specifications

All Tele Vue eyepieces listed have proprietary tuned full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, rubber grip rings, cover for the eyeguard, an undercut in the barrel for extra locking security and filter threads. All Tele Vue eyepiece lines are proprietary, in-house designs manufactured to our specifications and tolerances. Every eyepiece is individually tested at Tele Vue to ensure it meets our high optical and cosmetic standards.

Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EPL-55.0 55 Plössl 2" 4 / 2 50  38 46 3  1.4 2.3  1.16 1.13 / 18.1   Y 
 EPL-40.0 40 Plössl 1¼" 4 / 2 43  28 27 1.8 0.9  1.6  0.7 0.41 / 6.6 Y Y 
 EPL-32.0 32 Plössl 1¼" 4 / 2 50 B 22 27 1.9 0.9  1.6  0.25 0.39 / 6.2 Y Y 
 EAP-25.0 25 Plössl 1¼" 4 / 2 50 B 17 21.2 1.6 0.9  1.3  0.25 0.27 / 4.3 Y N 
 EAP-20.0 20 Plössl 1¼" 4 / 2 50 B 14 17.1 1.2 0.9  1.3  0.25 0.19 / 3.0 Y N 
 EAP-15.0 15 Plössl 1¼" 4 / 2 50 B 10 12.6 0.9 0.9  1.3  0.25 0.16 / 2.6 Y N 
 EAP-11.0 11 Plössl 1¼" 4 / 2 50 B 8 9.1 0.5 0.9  1.4  0.25 0.14 / 2.2 Y N 
 EAP-08.0 8 Plössl 1¼" 4 / 2 50 B 6 6.5 0.4 0.9  1.4  0.25 0.11 / 1.8 Y N 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EDE-18.2 18.2 DeLite 1¼"  /  62 B 20 19.1 1.9 1.1  1.9  0.25 0.48 / 7.6 Y Y Y
 EDE-15.0 15 DeLite 1¼"  /  62 B 20 16 2 1.1  1.9  0.25 0.47 / 7.5 Y Y Y
 EDE-13.0 13 DeLite 1¼"  /  62 B 20 13.8 2.3 1.1  1.9  0.25 0.49 / 7.8 Y Y Y
 EDE-11.0 11 DeLite 1¼"  /  62 B 20 11.7 2.3 1.1  1.9  0.25 0.44 / 7.1 Y Y Y
 EDE-09.0 9 DeLite 1¼"  /  62 B 20 9.6 2.4 1.1  1.9  0.25 0.46 / 7.3 Y Y Y
 EDE-07.0 7 DeLite 1¼"  /  62 B 20 7.5 2.6 1.1  1.9  0.25 0.46 / 7.3 Y Y Y
 EDE-05.0 5 DeLite 1¼"  /  62 B 20 5.3 3 1.1  1.9  0.25 0.47 / 7.5 Y Y Y
 EDE-04.0 4 DeLite 1¼"  /  62 B 20 4.3 3.1 1.1  1.9  0.25 0.48 / 7.6 Y Y Y
 EDE-03.0 3 DeLite 1¼"  /  62 B 20 3.2 3.1 1.1  1.9  0.25 0.49 / 7.8 Y Y Y
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EPO-41.0 41 Panoptic 2" 6 / 4 68 A 27 46 3.8  1.1 3  0.27 2.10 / 33.6   Y Y
 EPO-35.0 35 Panoptic 2" 6 / 4 68 C 24 38.7 3.1  1.2 2.6  0.17 1.60 / 25.6   Y 
 EPO-27.0 27 Panoptic 2" 6 / 4 68 A 19 30.5 2.4  1.2 2.1  0.29 1.03 / 16.4   Y 
 EPO-24.0 24 Panoptic 1¼" 6 / 4 68 B 15 27 2.1 0.8  1.9  0.25 0.51 / 8.2 Y Y* 
 EPO-19.0 19 Panoptic 1¼" 6 / 4 68 B 13 21.3 1.7 0.9  1.7  0.25 0.41 / 6.6 Y Y* 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EDL-17.3 17.3 Delos 1¼"  /  72 D 20 21.2 3.1 1.1  2.2  -0.23 0.90 / 14.4 Y Y Y
 EDL-14.0 14 Delos 1¼"  /  72 D 20 17.3 3.5 0.9  2.2  -0.23 0.90 / 14.4 Y Y Y
 EDL-12.0 12 Delos 1¼"  /  72 B 20 15 3.1 1.2  2.2  0.25 0.90 / 14.4 Y Y Y
 EDL-10.0 10 Delos 1¼"  /  72 B 20 12.7 3.5 1.1  2.2  0.25 0.90 / 14.4 Y Y Y
 EDL-08.0 8 Delos 1¼"  /  72 B 20 9.9 3.6 1.2  2.2  0.25 1.00 / 16.0 Y Y Y
 EDL-06.0 6 Delos 1¼"  /  72 B 20 7.6 4.1 1.1  2.2  0.25 1.00 / 16.0 Y Y Y
 EDL-04.5 4.5 Delos 1¼"  /  72 B 20 5.6 4 1.1  2.2  0.25 1.10 / 17.6 Y Y Y
 EDL-03.5 3.5 Delos 1¼"  /  72 B 20 4.4 4.2 1.1  2.2  0.25 1.10 / 17.6 Y Y Y
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EN5-31.0 31 Nagler 5 2" 6 / 4 82 B 19 42 3.9  1.5 3.3  -0.38 2.20 / 35.2   Y Y
 EN4-22.0 22 Nagler 4 2" 7 / 5 82 B 19 31.1 2.4  1.5 2.4  -0.29 1.50 / 24.0   Y Y
 EN5-16.0 16 Nagler 5 1¼" 6 / 4 82 B 10 22.1 1.5 1.2  1.7  0.28 0.44 / 7.1 Y N 
 EN6-13.0 13 Nagler 6 1¼" 7 / 4 82 B 12 17.6 1.6 1.3  1.6  0.25 0.40 / 6.4 Y Y* 
 EN6-09.0 9 Nagler 6 1¼" 7 / 4 82 B 12 12.4 1.9 1.2  1.6  0.25 0.42 / 6.7 Y Y* 
 EN6-07.0 7 Nagler 6 1¼" 7 / 4 82 B 12 9.7 2.2 1.2  1.6  0.25 0.50 / 8.0 Y Y* 
 EN6-05.0 5 Nagler 6 1¼" 7 / 4 82 B 12 7 2.1 1.2  1.6  0.25 0.49 / 7.9 Y Y* 
 EN6-03.5 3.5 Nagler 6 1¼" 7 / 4 82 B 12 4.8 2.2 1.2  1.6  0.25 0.53 / 8.5 Y Y* 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 ETH-21.0 21 Ethos 2"  /  100 B 15 36.2 4.3  1.62 2.95  -0.38 2.25 / 36.0   Y Y
 ETH-17.0 17 Ethos 2"  /  100 B 15 29.6 4.5  1.4 2.44  -0.39 1.55 / 24.8   Y Y
 ETH-13.0 13 Ethos 2" & 1¼"  /  100 D* 15 22.3 4 1.6 1.1 2.44 1.1 0.27 1.30 / 20.8 Y Y Y
 ETH-10.0 10 Ethos 2" & 1¼"  /  100 D* 15 17.7 3.8 1.6 1.1 2.3 1.1 0.27 1.10 / 17.6 Y Y Y
 ETH-08.0 8 Ethos 2" & 1¼"  /  100 B* 15 13.9 3.3 1.7 0.94 2.1 1.2 0.7 0.95 / 15.2 Y Y Y
 ETH-06.0 6 Ethos 2" & 1¼"  /  100 B* 15 10.4 3.5 1.5 0.94 2.1 1.1 0.7 0.97 / 15.5 Y Y Y
 ETH-04.7 4.7 Ethos SX 2" & 1¼"  /  110 B* 15 8.94 5.4 0.9  2.2  0.25 1.30 / 20.8 Y Y Y
 ETH-03.7 3.7 Ethos SX 2" & 1¼"  /  110 B* 15 7.04 5 1.1  2.2  0.25 1.10 / 17.6 Y Y Y
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 ENZ-0306 6-3 Nagler Zoom 1¼" 5 / 3 50 B 10 5.1-2.6 0.7 1.6  1.7  0.25 0.33 / 5.3 Y N 

Table Notes

1FL: Focal Length
2E / G: # Lens Elements / # Groups
3AF: Apparent Field of View
4G: Parfocal Group, eyepieces with the same letter are approximately parfocal — require little (if any) refocusing when used together. Letters marked with "*" indicate dual barrel eyepieces used in 1¼ " mode. They are parfocal with single-barrel eyepieces with the same letter. e.g., "B" is parfocal with "B*" in 1¼ " mode. Note, parfocality of dual barrel eyepieces will be inaccurate in use if the dual barrel eyepiece does not seat fully into an 1¼" adapter or diagonal.
5ER: Eye Relief
6Eyepiece Dimensions: see diagram
*Additional adapter required for Dioptrx™ attachment
7While the FoneMate™ will fit on any eyepiece that accepts DIOPTRX™, we have recommended only eyepieces most likely to show full illuminated fields.
8Read note on "F" at right about Parfocality.
all DeLite, Delos, & Ethos, plus Panoptic 41, & Naglers 31, 22, & 17.
Eyepiece Diagram (right)
A: Height of barrel above reference surface
B: Height of 1¼" barrel
C: Height of 2" barrel
D: Diameter of black barrel
E: Depth of 1¼" barrel
F: Approx. location of field stop.
Do not use "F" values other than +0.25 as an indicator of parfocality (negative number is above reference surface). "F" for dual barrel eyepieces is from the 2" holder stop as shown in the diagram to the right.

Tele Vue Eyepiece Notes

  • True Field in degrees of an eyepiece can be calculated from the field stop diameter and telescope focal length:

    True Field (°) = 57.3° x eyepiece field stop / telescope focal length

    All Nagler, Radian, Ethos, Delos, and DeLite eyepieces have internal focal planes. Field stop diameters and locations are "effective". Radian and Nagler type-4 eyepieces have "Instajust Eyeguards," and "pupil guide" accessory. Delos and DeLite eyepieces have an adjustable/lockable eyeguard.

  • The 55mm Plössl and 41mm Panoptic eyepieces have an adjustable height (removable) eyeguard.

  • Also available: 2X and 3X parfocal 1¼" Barlows; parfocal 2.5x and 5x 1¼" Powermates; 2X Big Barlow, 2x and 4x Powermates for 2" focusers. Use Paracorr (1.15X) to correct fast parabolic "Dob/Newts", dramatically sharpens field to take full advantage of Tele Vue eyepiece capabilities.

  • All dual barrel eyepieces work equally well in 1¼" or 2" focusers.

Discontinued or Unavailable Eyepiece Archive

For your convenience, this table lists older eyepieces that are currently no longer available.

Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EAL-11.0 11 Apollo (disc) 2" & 1¼" 0 / 0 85  18 16.2       1.37 / 21.9 Y Y Y
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EPL-07.4 7.4 Plössl (disc) 1¼" 0 / 0 50  5 6.2 0.26 0.88  1.32   0.10 / 1.6 Y N 
 EPL-10.5 10.5 Plössl (disc) 1¼" 0 / 0 50  7 8.7 0.47 0.88  1.32   0.10 / 1.6 Y N 
 EPL-13.0 13 Plössl (disc) 1¼" 0 / 0 50  9 10.9 0.65 0.88  1.32   0.20 / 3.2 Y N 
 EPL-17.0 17 Plössl (disc) 1¼" 0 / 0 50  12 14.3 0.9 0.88  1.32   0.20 / 3.2 Y N 
 EPL-21.0 21 Plössl (disc) 1¼" 0 / 0 50  14 18.1 1.18 0.88  1.32   0.20 / 3.2 Y N 
 EPL-26.0 26 Plössl (disc) 1¼" 0 / 0 50  18 22.1 1.5 0.88  1.32   0.30 / 4.8 Y N 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 ERD-03.0 3 Radian (disc) 1¼" 7 / 5 60 B 20 3.3 2.7 1.1  1.8  0.25 0.77 / 12.3 Y Y Y
 ERD-04.0 4 Radian (disc) 1¼" 7 / 5 60 B 20 4.2 2.6 1  1.8  0.25 0.76 / 12.1 Y Y Y
 ERD-05.0 5 Radian (disc) 1¼" 7 / 5 60 B 20 5.3 2.6 1.2  1.8  0.25 0.80 / 12.8 Y Y Y
 ERD-06.0 6 Radian (disc) 1¼" 7 / 5 60 B 20 6.3 2.5 1.3  1.8  0.25 0.79 / 12.6 Y Y Y
 ERD-08.0 8 Radian (disc) 1¼" 6 / 4 60 B 20 8.3 2.2 1.2  1.8  0.25 0.60 / 9.6 Y Y Y
 ERD-10.0 10 Radian (disc) 1¼" 6 / 4 60 B 20 10.5 1.9 1.2  1.8  0.25 0.54 / 8.7 Y Y Y
 ERD-12.0 12 Radian (disc) 1¼" 6 / 4 60 B 20 12.6 1.8 1.1  1.8  0.25 0.53 / 8.5 Y Y Y
 ERD-14.0 14 Radian (disc) 1¼" 6 / 4 60 B 20 14.4 1.6 1.4  1.8  0.25 0.54 / 8.7 Y Y Y
 ERD-18.0 18 Radian (disc) 1¼" 6 / 4 60 B 20 18.3 1.4 1.4  1.8  0.25 0.49 / 7.8 Y Y Y
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EWF-15.0 15 Wide Field (disc) 1¼" 0 / 0 65  9 15.4 1.27 0.88  1.33   0.30 / 4.8 Y N 
 EWF-19.0 19 Wide Field (disc) 1¼" 0 / 0 65  11 19.6 1.46 0.88  1.33   0.30 / 4.8 Y N 
 EWF-24.0 24 Wide Field (disc) 1¼" 0 / 0 65  14 24.7 1.91 0.88  1.78   0.50 / 8.0 Y N 
 EWF-32.0 32 Wide Field (disc) 2" 0 / 0 65  19 33 2.75 1.38  2.28   1.10 / 17.6   N 
 EWF-40.0 40 Wide Field (disc) 2" 0 / 0 65  24 41.2 3.5 1.51  2.64   2.00 / 32.0   N 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EPO-15.0 15 Panoptic (disc) 1¼" 6 / 4 68 B 10 17.1 1.3 0.9  1.4  0.25 0.30 / 4.8 Y N 
 EPO-22.0 22 Panoptic (disc) 2" & 1¼" 6 / 4 68 A 15 25 2 1.7 1 2.1 1.3 0.27 0.96 / 15.4   Y 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 EN6-02.5 2.5 Nagler 6 (disc) 1¼" 7 / 4 82 B 12 3.4 2.3 1.2  1.6  0.25 0.54 / 8.7 Y Y* 
 ENA-04.8 4.8 Nagler Original (disc) 1¼" 7 / 4 82 B 7 6.6 1.3 1.1  1.3  0.25 0.33 / 5.3 Y N 
 ENA-07.0 7 Nagler Original (disc) 1¼" 7 / 4 82 B 10 9.4 1.9 1.1  1.3  0.25 0.41 / 6.5 Y N 
 ENA-09.0 9 Nagler Original (disc) 2" & 1¼" 0 / 0 82  12 12.3 2.05 1.75 1 1.81   0.70 / 11.2   N 
 ENA-11.0 11 Nagler Original (disc) 2" & 1¼" 0 / 0 82  15 14.9       0.00 / 0.0   N 
 EN6-11.0 11 Nagler 6 (disc) 1¼" 7 / 4 82 B 12 14.9 1.7 1.2  1.6  0.25 0.42 / 6.7 Y Y* 
 EN4-12.0 12 Nagler 4 (disc) 2" & 1¼" 6 / 4 82  17 17.1 2.3 1.8 1 2.4 1.2 0.78 1.01 / 16.2   Y 
 EN2-12.0 12 Nagler 2 (disc) 2" & 1¼" 0 / 0 82  11 16.4 2.57 1.93 1.1 2.17   1.10 / 17.6   N 
 ENA-13.0 13 Nagler Original (disc) 2" & 1¼" 0 / 0 82  18 17.8 3.56 1.75 1 2.44 1.4 0.31 1.40 / 22.4   N 
 EN2-16.0 16 Nagler 2 (disc) 2" & 1¼" 0 / 0 82  10 21.9 2.32 1.93 1.11 2.17   1.00 / 16.0   N 
 EN4-17.0 17 Nagler 4 (disc) 2" 7 / 5 82  17 24.3 2.6  1.5 2.4  -0.03 1.60 / 25.6   Y Y
 EN2-20.0 20 Nagler 2 (disc) 2" 0 / 0 82  12 27.4 3.5 1.5  2.64   2.30 / 36.8   N 
 EN5-20.0 20 Nagler 5 (disc) 2" 6 / 4 82 C 12 27.4 2.1  1.3 2.1  0.15 1.04 / 16.6   Y* 
 EN5-26.0 26 Nagler 5 (disc) 2" 6 / 4 82  16 35 3  1.5 2.8  -0.05 1.60 / 25.6   Y 
Prod.
Code
1FL
(mm)
Eyepiece
Type
Barrel
(in.)
2E / G 3AF 4G 5ER
(mm)
Field
Stop
(mm)
6Eyepiece Dimensions (in.) Weight
(lb / oz)
Recommended
A B C D E 8F Bino Vue DIO-
PTRX
7Fone-
Mate
 CSZ-0824 24-8 Click Stop Zoom 1¼" 7 / 4 40-55  20-15 16.7-7.6 2.6 1  1.7  0.1 0.49 / 7.9 Y N 
 DCZ-2408 24-8 Click Zoom DX-Ready(disc) 1¼" 7 / 4 40-55  20-15 16.7-7.6 2.6 1  1.7  0.1 0.49 / 7.9 Y Y 
 ENZ-0204 4-2 Nagler Zoom (disc) 1¼" 5 / 3 50 B 10 3.3-1.7 0.9 1.6  1.7  0.25 0.36 / 5.7 Y N 

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