Explore Scientific 68° 24mm Waterproof Eyepiece - 1.25"

The 24mm 68° Full-Immersion Experience

With a 68° apparent field, this eyepiece provides a viewing window that feels expansive and immersive, a significant step up from standard Plössl designs. The 24mm focal length hits a sweet spot for many telescopes, offering wide true fields of view perfect for locating objects and observing large star clusters like the Pleiades (M45) or extended nebulae like the Orion Nebula (M42). Using low dispersion and high refractive index glasses, the design is optimized to produce sharp, high-resolution images across a superiorly flat field.

Argon-Purged: A 100% Waterproof Optical Chamber

The defining feature of this eyepiece is its sealed, Argon-purged body. Unlike nitrogen-purged optics, Argon's larger atoms are less prone to diffusing through seals over time, offering superior long-term protection. This process creates a dry, inert internal environment that completely prevents internal fogging during rapid temperature drops and stops the growth of fungus or the intrusion of fine dust. The trade-off for this durability is that the eyepiece is not user-serviceable, but the benefit is pristine internal elements that are protected for the life of the instrument.

Parfocal Design for Seamless Magnification Changes

As part of the Explore Scientific 68° Series, this 24mm eyepiece is parfocal with its siblings. This means that when you switch between different focal lengths in the series, the focus point remains nearly identical, requiring little to no adjustment. This is a critical time-saver in the field, allowing you to change magnification to study different details of an object without losing focus and having to start over. The eyepiece also features long eye relief and a foldable rubber eyecup, enhancing comfort for all observers, including those who wear glasses.

Explore Scientific 24mm 68° vs. Tele Vue 24mm Panoptic

The most common comparison for this eyepiece is the Tele Vue 24mm Panoptic, which is often considered the benchmark in this class.

• Tele Vue 24mm Panoptic: The Panoptic is renowned for its exceptional edge-to-edge sharpness and contrast. It is lighter than the Explore Scientific model and sets the standard for optical correction in a 68° eyepiece.
• Explore Scientific 24mm 68°: This eyepiece offers a directly comparable 68° field of view and excellent optical characteristics at a competitive price. Its key advantage is the Argon-purged waterproof construction, making it the superior choice for observers in humid or dew-prone climates, or for anyone prioritizing ruggedness and environmental durability.