52° Series Waterproof Eyepiece
$59.00
Affordable Flat-Field Eyepieces with a Wide 52° View
The 52° Series delivers exceptional quality and value versus a comparably priced Plossl, with flat-field, multi-element optics that hold sharp, high-contrast images all the way to the field edge.
Every eyepiece in the series is inert gas argon-purged for a fully waterproof, fog-proof design, and fully EMD (Enhanced Multi-Layer Deposition) coated with edge-blackened lens elements for maximum contrast.
Nine focal lengths, from 3mm for high-power planetary and double-star work up to a wide 40mm for expansive low-power views, let you build a complete eyepiece set within one consistent, affordable series.
Key Features
- 52° Apparent Field of View - flat-field, multi-element design for sharp edge-to-edge views
- Argon-Purged Waterproof Construction - fog-proof and moisture-sealed for reliable outdoor use
- Fully EMD Multi-Coated Optics - Enhanced Multi-Layer Deposition coatings for bright, high-contrast images
- Edge-Blackened Lens Elements - reduces internal reflections for improved contrast
- Nine Focal Lengths Available - 3mm, 4.5mm, 6.5mm, 10mm, 15mm, 20mm, 25mm, 30mm, and 40mm
- 1.25-Inch and 2-Inch Barrels - 40mm model steps up to a 2-inch barrel for the widest true field
| Specifications | |
|---|---|
| Apparent Field of View | 52 Degrees |
| Optical Design | Flat-Field Multi-Element |
| Coatings | Fully EMD Multi-Layer Coated, Edge-Blackened Elements |
| Waterproofing | Argon-Purged, Waterproof and Fog-Proof |
| Barrel Size | 1.25-Inch O.D. (3mm-30mm); 2-Inch O.D. (40mm) |
| Focal Lengths Available | 3mm, 4.5mm, 6.5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 40mm |
| Eye Relief | Comfortable eye relief that increases with focal length (approx. 15mm at 3mm, longest at 40mm) |
| Warranty | Limited warranty, activated with registration within 60 days of purchase |
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