TeleVue Nagler Zoom 3-6 mm (SKU: ENZ-0306)

Tele Vue Nagler Zoom 3–6 mm 1.25" eyepiece (SKU: ENZ-0306) (Tele Vue, SKU: ENZ-0306). The Tele Vue Nagler Zoom 3–6 mm is a variable-focal-length eyepiece designed by Al Nagler for high-power observing. Changing the focal length lets you match magnification to the target and current atmospheric steadiness without swapping eyepieces. The apparent field remains 50° throughout the range, while the parfocal design reduces the need to refocus during adjustment. Eye relief is 10 mm; this should not be regarded as a guarantee of comfortable full-field viewing while wearing glasses.

Key features

• continuous focal length adjustment over a 3–6 mm range
• constant 50° apparent field throughout the focal length range
• parfocal design maintaining the focal position when changing focal length
• five-element optical system with fully multicoated FMC surfaces
• fold-down eyeguard and standard 1.25" barrel

Included items

• eyepiece: Tele Vue Nagler Zoom 3–6 mm 1.25"

Technical specifications

• series: Nagler Zoom
• manufacturer designation: ENZ-0306
• focal length: 3–6 mm
• optical design: 5 elements in 3 groups
• apparent field of view: 50°
• field stop diameter: 2.6–5.1 mm
• eye relief: 10 mm
• parfocal group: B
• optical coatings: fully multicoated FMC
• eyeguard: fold-down
• barrel diameter: 1.25"
• eyepiece length: 58.4 mm
• maximum diameter: 43.2 mm
• weight: 150 g

The Nagler Zoom provides continuous adjustment of high magnification while retaining a constant apparent field of view.