Tele Vue Eyepieces for Tele Vue Refractors
Advice
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Albert Nagler
CEO, Tele Vue Optics

All Tele Vue refractors, because of their short focal length, have very wide field potential. And because their "APO" design permits high contrast, sharp, high magnification, color free viewing, they handle extraordinary power ranges. Tele Vue eyepieces are ideal for maximizing the performance of those scopes with 1¼" or 2" diagonals. The fast focal ratios of these telescopes place an extra burden on eyepiece performance. Because all Tele Vue eyepieces are designed for excellent sharpness over wide fields when used with fast telescopes, you'll get the most spectacular "spacewalk" viewing experiences using Ethos, Nagler, Delos and Panoptic eyepieces. If you must wear glasses to correct astigmatism and know the astigmatism value, it's best to call Tele Vue for specific advice. For a full explanation on how to choose eyepieces and an eyepiece calculator, you can check out Choosing Eyepieces.

Our 100° Ethos, 82° Naglers, and 72° Delos, in particular, will not only give you the widest, sharpest images, but very long viewing times as objects traverse the field. You won't have to constantly shift the scope to place the image in the "sweet spot," and of course, the whole "spacewalk" view is your "sweet spot."

I believe you only need from three to five eyepieces to cover the full range, from low-power, wide true field, to high-power for planetary viewing. My recommendations for the scopes with 2" diagonal capability (76, 85, 101, 127mm aperture) are as follows.

TV-76NP101/NP101isTV-85NP127/NP127is
1. Low Power with Very Wide True Field35 Panoptic(e)14x @ 4.62°15x @ 4.11°17x @ 3.70°19x @ 3.36°
31 Nagler T5(e) 15x @ 5.01°17x @ 4.46°19x @ 4.01°21x @ 3.65°
21 Ethos23x @ 4.32°26x @ 3.84°29x @ 3.46°31x @ 3.14°
2. Low Medium Power 15 Plössl32x @ 1.50°36x @ 1.34°40x @ 1.20°44x @ 1.09°
12 Nagler T4 40x @ 2.04°45x @ 1.81°50x @ 1.63°55x @ 1.48°
13 Nagler T6 37x @ 2.10°42x @ 1.87°46x @ 1.68°51x @ 1.53°
13 Ethos37x @ 2.66°42x @ 2.37°46x @ 2.13°51x @ 1.94°
14 Delos(e)34x @ 2.07°39x @ 1.84°43x @ 1.65°47x @ 1.50°
3. Medium Power 8 Plössl60x @ 0.78°68x @ 0.69°75x @ 0.62°83x @ 0.56°
8 Ethos60x @ 1.66°68x @ 1.47°75x @ 1.33°83x @ 1.21°
8 Delos(e)60x @ 1.18°68x @ 1.05°75x @ 0.95°83x @ 0.86°
7 Nagler T6 69x @ 1.16°77x @ 1.03°86x @ 0.93°94x @ 0.84°
6 Ethos80x @ 1.24°90x @ 1.10°100x @ 0.99°110x @ 0.90°
6 Delos(e)80x @ 0.91°90x @ 0.81°100x @ 0.73°110x @ 0.66°
4. Medium High Power 5 Nagler T6(m) 96x @ 0.84°(m)108x @ 0.74°120x @ 0.67°132x @ 0.61°
4.7 Ethos SX102x @ 1.07°115x @ 0.95°128x @ 0.85°140x @ 0.78°
4.5 Delos(e)107x @ 0.67°120x @ 0.59°133x @ 0.53°147x @ 0.49°
4. - 5. Alternate For Medium to High Power 6 - 3 Nagler Zoom   80-160x
@ 0.61-0.31°
   90-180x
@ 0.54-0.28°
   100-200x
@ 0.49-0.25°
   110-220x
@ 0.44-0.23°
5. High Power 3.5 Delos(e)137x @ 0.53°154x @ 0.47°171x @ 0.42°189x @ 0.38°
3.5 Nagler T6 137x @ 0.57°154x @ 0.51°171x @ 0.46°189x @ 0.42°
3.7 Ethos SX(m)130x @ 0.84°(m)146x @ 0.75°162x @ 0.67°178x @ 0.61°
Key Notes
(e) = extra eye relief
(m) = do not choose same true field at different magnifications (example noted on table above).
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