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William Optics 2" XWA 100° Extreme Wide Angle Eyepiece - 20mm

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Brand William Optics
Part Number E-XWA20
Availability available

Product Info

Manufacturer Description

New from William Optics

  • William Optics 20mm 100-deg Extreme Wide Angle (XWA) eyepiece
  • 2" barrel format
  • Comfortable 15mm eye relief
  • Twist-up eyecup
  • Fully multi-coated optics (9 elements in 6 groups) with blackened lens edges
  • Made in Taiwan from Taiwanese, Chinese, and Japanese components


  • Weight: 
    • 2" eyepiece: 1lb-14.1oz
  • Height:
    • 2" eyepiece (with eyeguard recessed): 152.3mm (6.0")
    • Eyeguard can extend by: 7.5mm (0.3")
  • Maximum width (excluding end caps): 74.5mm (2.91")


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Apparent Field of View 100°
Barrel Size 2" (50.8mm)
Bolt Case Included Yes - Free Agena Eyepiece Container
Bolt Case Size Agena 85x120mm
Coatings Fully Multi-Coated
Height (with Eye Guard) See item description
Max Width 74.5mm
End Caps 2
Eye Lens Diameter Xmm
Eye Relief by Design 15mm
Filter Threads Standard 2" Filter Thread (M48 x 0.75)
Focal Length 20mm
Lens Elements 9
Lens Groups 6
Rubber Eye Guard Twist-up Eyecup
Blackened Lens Edges Yes
Manufacturer William Optics
Eyepiece Focal Length 15.1mm - 20mm
Eyepiece Field of View Over 80 degrees
Eyepiece Series William Optics XWA
Barrel Type With safety undercut
Eyepiece Weight 30.10oz (853.32g)