Explore Scientific 100° Series 2" 25mm Waterproof Eyepiece

The 100° Series 25mm is an ultra-wide-field eyepiece delivering breathtaking panoramic views through a 2" barrel at low magnification. At 100° with a 25mm focal length, the true field of view is enormous: large star-forming regions, galaxy clusters, and sweeping Milky Way panoramas fill the eyepiece with an immersive sense of depth.

The premium multi-element optical design uses high-quality glass types to maintain sharp, well-corrected images across the entire hyper-wide field. Argon-purged waterproof construction keeps the optics sealed against moisture and fog-free inside.

Key Features

• 100° apparent field of view — hyper-wide panoramic framing
• Premium multi-element optics — high-quality glass types deliver sharp, color-corrected images with strong edge correction across the enormous field
• 2" barrel accommodates a 41mm field stop at the long focal length
• Argon-purged waterproof housing — sealed against moisture, fog, and temperature extremes
• Multi-layer coatings on all air-to-glass surfaces with edge-blackened elements for maximum contrast
• Fold-down silicone rubber eyecup with comfortable eye relief for extended viewing sessions

Ideal For

• Wide-field deep-sky observers who want immersive views: large nebula complexes, Milky Way star clouds, and galaxy groups at their most expansive within a 100° panoramic field
• Dobsonian and large-aperture telescope owners seeking a low-power, hyper-wide-field eyepiece for sweeping deep-sky observing
• Star party showcase