Tele Vue Eyepiece Specifications  

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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 F Bino Vue DIOPTRX
Digiscoping
 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  
 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  
 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  
 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  
 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  
 ERD-18.0  18  Radian  1¼"  6 / 4  60  B  20  18.3  1.4  1.4    1.8    0.25  0.49 / 7.8  Y  Y
 ERD-14.0  14  Radian  1¼"  6 / 4  60  B  20  14.4  1.6  1.4    1.8    0.25  0.54 / 8.7  Y  Y
 ERD-12.0  12  Radian  1¼"  6 / 4  60  B  20  12.6  1.8  1.1    1.8    0.25  0.53 / 8.5  Y  Y
 ERD-10.0  10  Radian  1¼"  6 / 4  60  B  20  10.5  1.9  1.2    1.8    0.25  0.54 / 8.7  Y  Y
 ERD-08.0  8  Radian  1¼"  6 / 4  60  B  20  8.3  2.2  1.2    1.8    0.25  0.60 / 9.6  Y  Y
 ERD-06.0  6  Radian  1¼"  7 / 5  60  B  20  6.3  2.5  1.3    1.8    0.25  0.79 / 12.6  Y  Y
 ERD-05.0  5  Radian  1¼"  7 / 5  60  B  20  5.3  2.6  1.2    1.8    0.25  0.80 / 12.8  Y  Y
 ERD-04.0  4  Radian  1¼"  7 / 5  60  B  20  4.2  2.6  1    1.8    0.25  0.76 / 12.1  Y  Y
 ERD-03.0  3  Radian  1¼"  7 / 5  60  B  20  3.3  2.7  1.1    1.8    0.25  0.77 / 12.3  Y  Y
 EPO-41.0  41  Panoptic  2"  6 / 4  68  A  27  46  3.8    1.1  3    0.27  2.10 / 33.6    Y
 EPO-35.0  35  Panoptic  2"  6 / 4  68  C  24  38.7  3.4    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  
 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  
 EN5-31.0  31  Nagler 5  2"  6 / 4  82    19  42  3.9    1.5  3.3    -0.38  2.20 / 35.2    Y
 EN5-26.0  26  Nagler 5  2"  6 / 4  82    16  35  3    1.5  2.8    -0.05  1.60 / 25.6    Y
 EN4-22.0  22  Nagler 4  2"  7 / 5  82    19  31.1  2.4    1.5  2.4    -0.29  1.50 / 24.0    Y
 EN5-20.0  20  Nagler 5  2"  6 / 4  82  C  12  27.4  2.1    1.3  2.1    0.15  1.04 / 16.6    
 EN4-17.0  17  Nagler 4  2"  7 / 5  82    17  24.3  2.6    1.5  2.4    -0.03  1.60 / 25.6    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  
 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  
 EN4-12.0  12  Nagler 4  2" & 1¼"  6 / 4  82    17  17.1  2.3  1.8  1  2.4  1.2  0.78  1.01 / 16.2    Y
 EN6-11.0  11  Nagler 6  1¼"  7 / 4  82  B  12  14.9  1.7  1.2    1.6    0.25  0.42 / 6.7  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  
 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  
 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  
 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  
 EN6-02.5  2.5  Nagler 6  1¼"  7 / 4  82  B  12  3.4  2.3  1.2    1.6    0.25  0.54 / 8.7  Y  
 ETH-21.0  21  Ethos  2"   /   100    15  36.2  4.3    1.62  2.95    -0.38  2.25 / 36.0    Y
 ETH-17.0  17  Ethos  2"   /   100    15  29.6  4.5    1.4  2.4    -0.39  1.55 / 24.8    Y
 ETH-13.0  13  Ethos  2" & 1¼"   /   100    15  22.3  4  1.6  1.1  2.5  1.1  0.27  1.30 / 20.8  Y  Y
 ETH-10.0  10  Ethos  2" & 1¼"   /   100    15  17.7  3.8  1.6  1.1  2.3  1.1  0.27  1.10 / 17.6  Y  Y
 ETH-08.0  8  Ethos  2" & 1¼"   /   100    15  13.9  3.3  1.7  0.94  2.1  1.2  0.7  0.95 / 15.2  Y  Y
 ETH-06.0  6  Ethos  2" & 1¼"   /   100    15  10.4  3.5  1.5  0.94  2.1  1.1  0.7  0.97 / 15.5  Y  Y
 ENZ-0204  4-2  Nagler Zoom  1¼"  5 / 3  50  B  10  3.3-1.7  0.9  1.6    1.7    0.25  0.36 / 5.7  Y  
 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  
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 F Bino Vue DIOPTRX
Digiscoping

 

  Table Footnotes
 

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.

5ER: Eye Relief

6Eyepiece Dimensions: see 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 (negative number is above reference surface)

  Table Eyepiece Notes
 

  • All Tele Vue eyepieces listed have full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, and filter threads. They are all based on patented designs by Al Nagler and are individually tested to be diffraction-limited on-axis.
    All Nagler and Radian 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.
  • The 55mm Plössl and 41mm Panoptic eyepieces have an adjustable height (removable) eyeguard.
  • Also available: 2X and 3X parfocal 1-1/4" Barlows; parfocal 2.5x and 5x 1-1/4" 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 1-1/4" or 2" focusers.

  Discontinued Eyepiece Archive
 

Prod.
Code		 Eyepiece Field
Stop
(mm)
ENA-04.8 4.8 Nagler 6.6
ENA-07.0 7 Nagler 9.4
ENA-09.0 9 Nagler 12.3
ENA-11.0 11 Nagler 14.9
ENA-13.0 13 Nagler 17.8
EN2-12.0 12 Nagler 2 16.4
EN2-16.0 16 Nagler 2 21.9
EN2-20.0 20 Nagler 2 27.4
EWF-15.0 15 Wide Field 15.4
EWF-19.0 19 Wide Field 19.6
EWF-24.0 24 Wide Field 24.7
EWF-32.0 32 Wide Field 33
EWF-40.0 40 Wide Field 41.2
EPO-15.0 15 Panoptic 17.1
EPO-22.0 22 Panoptic 25
EPL-07.4 7.4 Plössl 6.2
EPL-10.5 10.5 Plössl 8.7
EPL-13.0 13 Plössl 10.8
EPL-17.0 17 Plössl 14.3
EPL-21.0 21 Plössl 18
EPL-26.0 26 Plössl 22.1
For your convenience this table lists discontinued eyepiece field stops.