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Tele Vue DeLite 7mm 62° Eyepiece - 1.25"
The Tele Vue DeLite 7mm is engineered as a compact, lightweight evolution of the Delos series, utilizing optical advancements derived from the Ethos project to achieve high-contrast performance in a 1.25-inch format. By scaling the design to a 62° apparent field, this optic maintains the pure image quality of the Delos while reducing total mass to 7.4 oz. It serves as a technically precise solution for observers requiring long eye relief and Dioptrx compatibility in a portable mechanical footprint.
20mm Eye Relief and Adjustable Locking Eyeguard
The Tele Vue DeLite 7mm is engineered with a constant 20mm eye relief and a sliding mechanical housing to ensure consistent, comfortable eye placement for all observers. This long-relief design allows eyeglass wearers to maintain enough clearance to see the entire 62° field without contact between spectacles and the eyepiece. By locking the eyeguard at the specific height required for your eye's anatomy, you effectively eliminate the blackouts and "kidney-beaning" caused by improper eye positioning.
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Sliding Locking Eyeguard: Provides a physical hard-stop to secure the optimal eye point for consistent viewing sessions.
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Dioptrx Compatibility: Integrates directly with Tele Vue Dioptrx lenses to resolve eyesight astigmatism while maintaining the ergonomic benefits of long eye relief.
7.9mm Field Stop and High-Power Magnification
With a 7.9mm field stop, the Tele Vue DeLite 7mm is optimized for high-magnification observation of planetary detail, double stars, and lunar features. In an 8-inch f/10 Schmidt-Cassegrain, this eyepiece produces 285x magnification, delivering the scale necessary to resolve the Cassini Division or rilles on the lunar surface. The 62° field format is physically smaller than the Delos or Nagler lines, facilitating easier balance on lightweight mounts and compact travel telescopes.
Operational Comparison
Observers often evaluate the Tele Vue DeLite 7mm against wider-field designs based on weight, eye relief, and specific telescope requirements.
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vs. 7mm Nagler Type 6: The Nagler provides an 82° field but limits eye relief to 12mm, whereas the DeLite 7mm provides 20mm of eye relief for superior eyeglass compatibility.
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vs. 6mm Delos: While the Delos offers a 72° field and 20mm eye relief, the DeLite 7mm is significantly more compact and lighter, improving balance on smaller tracking mounts.
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Does the Tele Vue 7mm DeLite provide enough eye relief for eyeglasses?
Yes, the Tele Vue 7mm DeLite features a constant 20mm eye relief, which is specifically designed to allow spectacle wearers to see the entire 62° apparent field without removing their glasses. The adjustable sliding eyeguard allows users to lock in the exact height needed to eliminate blackouts caused by improper eye positioning.
How does the Tele Vue 7mm DeLite compare to the 7mm Nagler Type 6?
The Tele Vue 7mm DeLite prioritizes eye relief (20mm) and absolute on-axis contrast over the wider 82° field of the Nagler. While the Nagler offers a more immersive "spacewalk" feel, the DeLite’s 62° field and simpler lens geometry often result in better scatter control for planetary observers and those using eyeglass correction.
Is the Tele Vue 7mm DeLite suitable for planetary viewing in an f/10 SCT?
In a standard 8-inch f/10 Schmidt-Cassegrain, the Tele Vue 7mm DeLite yields 285x magnification and a 0.7mm exit pupil. This configuration is highly effective for resolving detail on Jupiter or Saturn during nights of steady atmospheric seeing, though it may be too high for frequent use under turbulent conditions.
Can the Tele Vue 7mm DeLite be used for bino-viewing?
The Tele Vue 7mm DeLite is an industry-standard choice for binoviewers due to its slim 1.9-inch housing diameter, which provides ample space for most interpupillary distances. Its light weight (7.5 oz) also helps prevent balance issues and strain on the binoviewer’s internal prisms.
Does the Tele Vue 7mm DeLite show "kidney-beaning" or spherical aberration of the exit pupil?
The Tele Vue 7mm DeLite is optically corrected to minimize spherical aberration of the exit pupil, significantly reducing the "kidney-bean" effect common in long-eye-relief eyepieces. Proper use of the sliding eyeguard ensures the eye remains at the correct focal point to keep the field fully illuminated.
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| Focal Length |
7 mm |
| Apparent Field of View |
62° |
| Eye Relief |
20 mm |
| Field Stop Diameter |
7.9 mm |
| Barrel Size |
1.25" |
| Weight |
7.4 oz (210 g) |
| Elements/Groups |
6/4 |
| Parfocal |
Yes (Group B) |
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TeleVue 5-Year Limited Warranty for Telescopes and Accessories
