Observing Aids

  • #918A Diagonal Mirror (1.25")
    Meade
    Vendor
    Meade
    Regular price
    $39.99
    Sale price
    save $-39.99
    Unit price
    per 
  • (Discontinued) 2" TO 1.25" ADAPTER W/ TWIST-LOCK (93668)
    Celestron
    Vendor
    Celestron
    Regular price
    $44.95
    Sale price
    save $-44.95
    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" 45-Degree Erecting Prism (D1032)
    Stellarvue
    Vendor
    Stellarvue
    Regular price
    $69
    Sale price
    save $-69
    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 
  • 1.25" Compression Ring Adapter (FA002)
    Stellarvue
    Vendor
    Stellarvue
    Regular price
    $29
    Sale price
    save $-29
    Unit price
    per 
  • 1.25" Diagonal
    Takahashi
    Vendor
    Takahashi
    Regular price
    $170
    Sale price
    save $-170
    Unit price
    per 
  • 1.25" Dielectric Star Diagonal (D1030)
    Stellarvue
    Vendor
    Stellarvue
    Regular price
    $99
    Sale price
    save $-99
    Unit price
    per 
  • 1.25" Dielectric Star Diagonal with Twist-Lock (93571)
    Celestron
    Vendor
    Celestron
    Regular price
    $154.95
    Sale price
    save $-154.95
    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 
  • 1.25" Erecting Prism for Red/White Cat
    William Optics
    Vendor
    William Optics
    Regular price
    $137
    Sale price
    save $-137
    Unit price
    per 
  • 1.25" Mirror Diagonal (6231)
    iOptron
    Vendor
    iOptron
    Regular price
    $79
    Sale price
    save $-79
    Unit price
    per 
  • 1.25" Star Diagonal (94115-A)
    Celestron
    Vendor
    Celestron
    Regular price
    $51.95
    Sale price
    save $-51.95
    Unit price
    per 
  • 1.25" Threadin Extension Tube with 1" Eye Piece Push Back
    Lumicon
    Vendor
    Lumicon
    Regular price
    Sold out
    Sale price
    save $-12.10
    Unit price
    per 
  • 1.25" Visual Back (93653-A)
    Celestron
    Vendor
    Celestron
    Regular price
    $44.95
    Sale price
    save $-44.95
    Unit price
    per 
  • 1.25″ & 2″ Aluminium Dust Caps
    nPAE
    Vendor
    nPAE
    Regular price
    $56.20
    Sale price
    save $-56.20
    Unit price
    per 
  • 1.25″ Ruby Turret
    nPAE
    Vendor
    nPAE
    Regular price
    $906.23
    Sale price
    save $-906.23
    Unit price
    per 
  • 2 inch - 1.25 inch Adapters
    Tele Vue
    Vendor
    Tele Vue
    Regular price
    $53
    Sale price
    save $-53
    Unit price
    per 
  • 2 inch Mirror Diagonal
    Planewave
    Vendor
    Planewave
    Regular price
    $320
    Sale price
    save $-320
    Unit price
    per 
  • 2" 10th Wave Mirror Diagonal with 1.25" Adapter
    Takahashi
    Vendor
    Takahashi
    Regular price
    $650
    Sale price
    save $-650
    Unit price
    per 
  • 2" 99% Reflectivity Star Diagonal (DD02-00CF)
    Explore Scientific
    Vendor
    Explore Scientific
    Regular price
    $199.99
    Sale price
    save $-199.99
    Unit price
    per 
  • 2" Adapter for Takahashi Collimating Telescope
    Takahashi
    Vendor
    Takahashi
    Regular price
    $173
    Sale price
    save $-173
    Unit price
    per 
  • 2" Dielectric Star Diagonal (D1028ECF)
    Stellarvue
    Vendor
    Stellarvue
    Regular price
    $159
    Sale price
    save $-159
    Unit price
    per 
  • 2" Dielectric Star Diagonal with Twist-Lock (93573)
    Celestron
    Vendor
    Celestron
    Regular price
    $249.95
    Sale price
    save $-249.95
    Unit price
    per 
  • 2" Extension Tube (TKP31112)
    Takahashi
    Vendor
    Takahashi
    Regular price
    $194
    Sale price
    save $-194
    Unit price
    per 
  • 2" Eyepiece Barrel Extender
    Tele Vue
    Vendor
    Tele Vue
    Regular price
    $36
    Sale price
    save $-36
    Unit price
    per 
  • 2" Male - 1.25" Female Reducing Adapter
    Lumicon
    Vendor
    Lumicon
    Regular price
    $18.70
    Sale price
    save $-18.70
    Unit price
    per 
  • 2" Mirror Diagonal with 1.25" Adapter (6232)
    iOptron
    Vendor
    iOptron
    Regular price
    $148
    Sale price
    save $-148
    Unit price
    per 
  • 2" Mirror Star Diagonal with XLT Coatings (93527)
    Celestron
    Vendor
    Celestron
    Regular price
    $199.95
    Sale price
    save $-199.95
    Unit price
    per 
  • 2" Quartz Dielectric Star Diagonal (D1040Q)
    Stellarvue
    Vendor
    Stellarvue
    Regular price
    $249
    Sale price
    save $-249
    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 
  • 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 


Personal Upgrade Path

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