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SWAN 9mm Eyepiece (1.25 inch)

$102.22

Introducing SWAN (distributed by William Optics) eyepieces, for your most demanding visual observations. Features an internally baffled barrel, all lenses’ edges and internal spacers blackened, and fully multicoated. Unforgettable views of star clusters and the moon at 72 deg. F.O.V.  A premium eyepiece at a fraction of the cost it’s worth. This unit has a focal length of 20mm.

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SKU: ASC9620ACC Categories: ,
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SWAN 9mm Eyepiece (1.25 inch)

Introducing SWAN (distributed by William Optics) eyepieces, for your most demanding visual observations. Features an internally baffled barrel, all lenses’ edges and internal spacers blackened, and fully multicoated. Unforgettable views of star clusters and the moon at 72 deg. F.O.V.  A premium eyepiece at a fraction of the cost it’s worth. This 9mm Eyepiece unit has a focal length of 9mm.

Super Wide FOV
• Outstanding super-wide field of view: 72 deg. F.O.V.
• Fully Multicoated lenses for excellent transmittance.
• Reduced chromatic aberration.
• Improved contrast compared to similar EPs.

Great Contrast
• Fully internally blackened (lens edges and internal spacers).
• No flaring or ghosting on high-contrast objects.
• Parfocal.

Light and Easy
• Soft rubber eyecup.
• Long eye-relief: 12mm.
• No internal reflections, kidney beaning or other distracting distortions.

Terrific Fit and Finish
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser.
• Threaded for filters’ usage.

Weight0.15 kg
Dimensions5 × 5 × 10 cm

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ModelSWAN 9
Focal Length9mm
Lens Structure (#Elements/#Groups)5/4
Field of View72
Eye Relief12mm
Barrel1.25″
CoatingFMC
ParfocalYes
Weight70 g
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