SWAN 20mm 1.25" Eyepiece (E-SWA20)
SWAN 20mm 1.25" Eyepiece (E-SWA20)
SWAN 20mm 1.25" Eyepiece (E-SWA20)
SWAN 20mm 1.25" Eyepiece (E-SWA20)
SWAN 20mm 1.25" Eyepiece (E-SWA20)
SWAN 20mm 1.25" Eyepiece (E-SWA20)

William Optics

SWAN 20mm 1.25" Eyepiece (E-SWA20)

Regular price
$ 87.00 Sold out
Sale price
$ 87.00
Unit price

Please contact Cloud Break Optics to order this product


SWAN: the perfect compromise between quality, cost, eye-relief and edge sharpness.
All with a SWA super-wide angle 72 deg. F.O.V. ! The ultimate 1.25 ” SWA eyepiece. 
Try and compare! Ideal for SCT and refractor telescopes.

Perfect match with William Optics telescopes 
• Outstanding super-wide field of view: 72 deg. F.O.V.
• Fully Multicoated lenses for excellent transmittance.
• Outstanding chromatic aberration correction.
• Excellent contrast and light throughput for sharp viewing.

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

Light and Easy 
• Soft rubber eyecup
• Long eye-relief: 17 mm
• No internal reflections or kidney bean effect

Terrific Fit and Finish 
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser. 
• Threaded for 1.25” filters.


Internally baffled, All lenses' edges and internal spacers blackened, Fully multicoated
Model SWAN 20
Focal Length 20 mm
Lens Structure (#Elements/#Groups) 5/4
Field of View 72
Eye Relief 17 mm
Barrel 1.25"
Coating FMC
Parfocal Yes
Weight 100 g


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