Explore Scientific 82° Ar 11 mm: medium magnification with maximum usability
The Explore Scientific 82-degree Ar 11 mm is a waterproof wide-angle eyepiece filled with argon. The argon filling permanently keeps moisture, dust, and fungus out of the optics: the eyepiece does not fog up from the inside and is even washable during cleaning.
The 11 mm is one of the most versatile focal lengths: the Moon, planets, globular clusters, and smaller nebulae are all well suited to it.





82 degree field of view
The apparent field of view of 82 degrees gives the feeling of looking into space instead of through a tube. Furthermore, on a Dobsonian without a tracking motor, objects remain in view longer before you need to make adjustments.

EMD coating
The patented EMD (Enhanced Multilayer Deposition) coating increases light transmission and suppresses reflections and ghosting, leading to a high-contrast image right to the edge, along with blackened lens edges.

Built for years of outdoor use
The all-metal housing is argon-filled and sealed. The flip-up eyecup allows for eyeglass wearers, and the connection size has filter threading for color and haze filters.
Featured accessories
Combine this eyepiece with a moon filter or a planetary observation filter set and an eyepiece case for safe transport. The filters from the Explore Scientific filter sets fit directly into the 1.25-inch thread.
For whom yes and for whom no
- ✓ Observers who want a waterproof, wide-angle eyepiece that can withstand dew and field use
- ✓ Dobson owners who want to keep objects in view longer
- For those who mainly observe deep-sky objects at low power: choose a longer focal length or a 2-inch eyepiece.
Specifications
| Focal length | 11 mm |
| Apparent field of view | 82 degrees |
| Connection size | 1.25 inches (31.75 mm) |
| Coating | EMD-multicoating, blackened lens edges |
| Filling | Argon, waterproof sealed |
| Eyecup | Foldable |
| Filter thread | Yes, 1.25 inch |
You can find more accessories for this merk at the Explore Scientific merk Page.









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