Observing Aids by William Optics

  • 1.25" Erecting Prism for Red/White Cat
    William Optics
    Vendor
    William Optics
    Regular price
    $137
    Sale price
    save $-137
    Unit price
    per 
  • Vixen Style Mounting Base (BAFM-ST001II)
    William Optics
    Vendor
    William Optics
    Regular price
    $22
    Sale price
    save $-22
    Unit price
    per 
  • William Optics Durabright Rotolock 2" WO Diagonal with Thermometer (D-DIG2D-ROTO-A2)
    William Optics
    Vendor
    William Optics
    Regular price
    $198
    Sale price
    save $-198
    Unit price
    per 
  • WO- 3.5-2 ROTOLOCK VISUAL BACK ADAPTER (F-ROTO-A3.5-2)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-194
    Unit price
    per 
  • William Optics ROTO adapter (D-ROTO-A2-SCT328F)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-99
    Unit price
    per 
  • 1.25" DURA BRIGHT Dielectric Diagonal (D-125D-C-DB0)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-110
    Unit price
    per 
  • 2" Rotolock M63 for Zenithstar 71 (F-ROTO-A63SL)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-97
    Unit price
    per 
  • 2" Rotolock M54 for Zenithstar 61 (F-ROTO-A54SL)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-97
    Unit price
    per 
  • WO- 2-1.25 ROTOLOCK Visual Back Adapter (F-ROTO-A2-125)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-59
    Unit price
    per 
  • Push-in nose piece for WO Diagonals (WD-DIG2A)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-33
    Unit price
    per 
  • 2x Barlow nosepiece for Binoviewer (E-BINO-B2)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-44
    Unit price
    per 
  • Binoviewer Complete Package (E-BINO-P)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-310
    Unit price
    per 
  • 1.25 " 45 Deg. Erecting Prism (D-EP125)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-92
    Unit price
    per 
  • 1.25" 99% Dielectric Dura Bright Star Mirror Diagonal for Star71 Telescope (D-125D-WO71)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-135
    Unit price
    per 
  • Dura Bright 2" Dielectric diagonal for SCT threaded Scope with Thermometer (D-DIG2D-C-DB-SCT)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-172
    Unit price
    per 
  • SCT 1.25" Rotolock Visual Back (F-ROTO-A2-125-SCT-TA)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-96
    Unit price
    per 
  • Vixen style Finder Mounting Bracket (M-FB50-B)
    William Optics
    Vendor
    William Optics
    Regular price
    Sold out
    Sale price
    save $-64
    Unit price
    per 


Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.