Explore Scientific Field Eyepiece

Because this is a 2-inch barrel eyepiece, it is designed for telescopes with a 2-inch focuser. Given its 12mm focal length and wide 92-degree field, it performs exceptionally well on telescopes with medium to long focal lengths, providing a balance of magnification and a massive, immersive field of view.

Yes, the 20mm eye relief is generous enough to accommodate most eyeglass wearers. You should be able to take in the full 92-degree field without having to press your glasses uncomfortably against the eyepiece.

Argon-purging replaces the air inside the eyepiece with an inert gas, which prevents internal fogging when temperatures drop rapidly at night. It also protects the internal optical elements from moisture and mold, ensuring the eyepiece remains clear and pristine over many years of use.

At 2.12 lbs, this is a substantial piece of glass. Depending on your telescope's mount, you may need to adjust your counterweights or balance system to prevent the telescope from drifting or becoming unbalanced when swapping to this eyepiece.

A 92-degree field creates a 'picture window' effect, where the edges of the eyepiece seem to disappear. This makes it much easier to locate celestial objects and provides a sense of depth and scale that makes deep-sky observing feel more immersive than standard eyepieces.

The complex eight-element design is specifically engineered to correct for aberrations, ensuring that stars remain sharp and pinpoint-like even toward the edges of the frame. By using low-dispersion glass and full multicoatings, it maintains high contrast and a flat field across the entire view.