Tele Vue 3-6mm Nagler Zoom 1.25" Eyepiece #ENZ-0306

The Tele Vue 3-6mm Nagler Zoom 1.25" Eyepiece represents a significant advancement in the realm of high-magnification astronomical optics, challenging the status quo of short-focal-length eyepieces. This innovative eyepiece is a testament to Tele Vue's commitment to quality and performance, offering a seamless zoom capability with click-stop settings at 3mm, 4mm, 5mm, and 6mm focal lengths. This feature allows astronomers to fine-tune magnification in response to varying atmospheric conditions, a critical aspect of high-power celestial observation.

Crafted with precision, the Nagler Zoom maintains a constant 50-degree apparent field of view across its zoom range, rivaling the performance of fixed-focal-length eyepieces. Its optical design, consisting of just 5 elements in 3 groups, minimizes the number of air-glass surfaces, thereby enhancing contrast and resolution. This design choice echoes the simplicity and effectiveness of classic Plossl or Orthoscopic eyepieces, yet incorporates the versatility of a zoom.

Despite its compact size and light weight of only 0.3 lbs, the Nagler Zoom does not compromise on user comfort. It boasts a consistent 10mm eye relief, which, while not ideal for eyeglass wearers, provides a comfortable viewing experience for most users. The eyepiece is parfocal throughout its zoom range and with other Tele Vue 1.25" eyepieces, ensuring that focus adjustments are minimal when changing magnifications or switching eyepieces.

The Tele Vue 3-6mm Nagler Zoom is engineered with full multi-coatings and blackened lens edges to reduce internal reflections and maximize light transmission, resulting in high-contrast images that bring out the finest details in planetary and lunar surfaces. The fold-down eyeguard, rubber grip-ring, and safety undercut are thoughtful additions that enhance the overall user experience. Additionally, the eyepiece is equipped with anti-reflection threads and filter threads, allowing for the use of standard 1.25" filters to further improve observation quality.

This eyepiece is a perfect match for discerning astronomers who seek the best possible visual experience, without the limitations often associated with zoom eyepieces. The Tele Vue 3-6mm Nagler Zoom 1.25" Eyepiece dispels the myth of the "compromised zoom" and stands as a pinnacle of optical innovation, delivering superb, tack-sharp views across its entire magnification range, even when paired with fast apochromatic refractors.