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Black 1.25 inch eyepiece barrel with rubber eyeguard and 3.5mm focal length

Tele Vue

Tele Vue Nagler Type-6 3.5mm 1.25" Eyepiece 82° FOV

SKU CH-VNBH-TAG2P

A 3.5 mm focal-length eyepiece with a 82° apparent field, 12 mm eye relief and a 4.8 mm field stop in a compact 1.25" parfocal body

  • 82° apparent field frames lunar and planetary detail
  • 5 mm focal length gives high magnification in 1.25" barrel
  • 12 mm eye relief allows comfortable viewing with glasses
  • 7-element exotic-glass design yields pinpoint sharpness across the field
  • 100% flat-field inspection guarantees contrast on every unit

Compact High-Power Planetary Eyepiece

The Tele Vue Nagler Type-6 3.5mm is a 1.25" eyepiece built for lunar and planetary observation at high magnification. Its 82° apparent field provides expansive views without the tunnel vision typical of short focal lengths. The 7-element optical design uses exotic glasses and advanced coatings to maintain pinpoint sharpness across the full field. It suits observers who want high power with generous eye relief and contrast.

Thermals Noise and Power

This is a passive optical component with no electronics, fans or power requirements. It produces no noise and draws no current during use. The barrel accepts standard 1.25" focusers and diagonals. Blackened lens edges and anti-reflection threading suppress internal scatter to preserve image contrast. A rubber eyeguard shields the eye from stray light and improves comfort at the telescope.

Upgrade Path and Value

The 3.5mm focal length follows a 1.4x progression from 5mm and 7mm Naglers, letting observers step up in power while retaining the same wide field character. It replaces narrower high-power oculars that force a choice between magnification and field size. The 12mm eye relief avoids the pinhead viewing experience common in short focal length designs. Buyers who need longer focal lengths for wide-field deep-sky work or who require 2" barrel compatibility should look elsewhere.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $280.99
Pricier than about 72% of the 1,401 comparable items (median $93.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 3.5 mm Nagler Type-6 eyepiece in my 1.25" focuser, and what step do people often miss?

Slide the 1.25" barrel into the focuser drawtube and lock the thumbscrew; the step many miss is checking that the 12 mm eye relief lets you see the full 82° field without vignetting, especially if you wear glasses.

What maintenance or replacement will the 3.5 mm Nagler Type-6 need over time?

The rubber eyeguard can be folded down or replaced if it wears, and the seven coated lens elements should only be cleaned with a puffer and optical tissue to preserve the anti-reflection threads and blackened edges.

What limit appears first during a long high-power planetary session with the 3.5 mm Nagler?

The 4.8 mm field stop and 3.5 mm focal length combine with fast scopes to push exit pupil below 1 mm, so atmospheric seeing and floaters in your own eye become the limiting factor before the eyepiece itself.

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