in stock
in stock

William Optics SWAN 20 mm 1.25" Super Wide Angle Eyepiece - 72° Field

78,45 EUR
excl. VAT
excl. 4,65 € Shipping costs


William Optics SWAN 20 mm 1.25" Super Wide Angle Eyepiece - 72° Field

A good all-round eyepiece for not too fast telescopes

William Optics 20 mm SWAN Eyepiece

William Optics Swan eyepieces are super-wide-angle designs with 72° apparent field of view. They use simple but sophisticated five-lens optical systems for generally higher contrast than the more complicated optical designs used in some other SWA eyepieces that use up to eight lenses.

All lenses are fully multicoated for high light transmission. Lens edges and internal field stops are blackened to reduce internal reflections and improve contrast. The rubber grip ring is useful for safer handling of the heavier 2” eyepieces in cold weather when wearing gloves. The eyepieces have soft roll down rubber eyecups for eyeglass use.

They are remarkably good all-round eyepieces when used with telescopes with focal ratios up to f/6 and above.

  • 20 mm Swan, 1.25" barrel
  • 5/4 lenses/groups
  • 72 degree FOV
  • 17 mm eye relief
  • Field stop diameter: 25 mm
  • Weight: 100 g
  • Coatings: FMC

Scope of delivery:

1 Eyepiece incl. dust caps

Swan 20 Eyepiece view
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