William Optics 20mm Swan Eyepiece - 1.25"
William Optics 20mm SWAN Eyepiece
The William Optics SWAN 20mm Eyepiece has soft roll down rubber eyecups for eyeglass use. They can be used for all types of observing, with all telescope types, but they are recommended for use with focal ratios up to f/6 and above. Dust caps are provided for both ends of each eyepiece. A soft protective drawstring-equipped velvet storage bag is standard equipment with each.
This 5-element super-wide angle 2-mm SWAN EPƒ???????????s panoramic views at 72 deg. F.O.V. will leave you speechless!
William Optics 20mm SWAN Eyepiece Features
- Fully Multicoated lenses for excellent transmittance..
- Reduced chromatic aberration.
- Improved sharpness and contrast throughout the field.
- No internal reflections, kidney beaning, pin-cushion or other distortions.
- Smooth design for no hook up in your focuser.
- Threaded for filter usage.
- Rubber grip ring for safe, comfortable handling.
Dust Caps IncludedYes
Eye Guard IncludedYes
Eye Relief 18.5mm
Eyepiece Apparent FOV72 degrees
Eyepiece Eye Relief17mm
Eyepiece Special FeatureNone
Field StopNot supplied by manufacturer
Lens Elements & Groups5 elements & 4 groups
ModelWilliam Optics Swan
Optical DesignWide Angle
Warranty2 Year Warranty
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