Shop by Brand
Shop by Price

William Optics SWAN Eyepieces

William Optics SWAN Eyepieces
Eyepiece Focal Length: 9mm (1.25Eyepiece Focal Length: 15mm (1.25Eyepiece Focal Length: 20mm (1.25Eyepiece Focal Length: 25mm (2Eyepiece Focal Length: 33mm (2Eyepiece Focal Length: 40mm (2
Price:  £74.00
List Price:  £79.00
(Inc. 20% VAT)

Product Code:  SWAN9
Brand:  William Optics
Eyepiece Type:  Super-Wide Angle
Field of View:  72 degrees
Barrel Size:  1.25" and 2" Eyepiece

William Optics

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 SWA eyepieces. 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
  • 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"/2" filters.

Long Eye Relief:

  • 9mm eyepiece: 12mm
  • 15mm eyepiece: tbc
  • 20mm eyepiece: 17mm
  • 25mm eyepiece: 25mm
  • 33mm eyepeice: 28mm
  • 40mm eyepiece: 28mm

Focal Length       9mm
Lens Structure     5/4
Field of View        72
Eye Relief            12mm
Barrel                   1.25"
Coating                FMC
Parfocal               Yes
Weight                 70g

Be the first to Write a Review for this item!


We are here to help

Facebook      Twitter      Instagram     Maps     Phone

Telephone: 01353 776199 or 07990 646466

2 Rosemary Lane, Sutton nr. Ely, Cambridgeshire, CB6 2NZ
Telephone Hours:  
Monday to Saturday - 10:00am-4:00pm
Our showroom is currently closed for visits until further notice.
We are closed on Bank Holidays. Online orders are despatched as normal.