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Astrophotography Deal - Celestron 11" RASA - $1000 Off - Now Only $2595 - Limited Quantity On Hand

William Optics

Items 76 - 100 of 177
William Optics Zenithstar 103 Imaging APO Refractor with Bahtinov Mask Cover

William Optics Zenithstar 103 Imaging APO Refractor with Saddle Handle Bar- Blue - A-Z103IIBU

SKU: WYO-A-Z103II-BU
  • Optical Design: Refractor
  • Telescope Aperture: 103mm (4.06")
  • Focal Ratio: f/6.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,198.00
William Optics Zenithstar 103 Imaging APO Refractor with Bahtinov Mask Cover - Gold

William Optics Zenithstar 103 Imaging APO Refractor with Saddle Handle Bar - Gold - A-Z103IIGD

SKU: WYO-A-Z103II-GD
  • Optical Design: Refractor
  • Telescope Aperture: 103mm (4.06")
  • Focal Ratio: f/6.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,198.00
William Optics Guide Star 61 Apochromatic Refractor OTA in Blue

William Optics Guide Star 61 APO Refractor Telescope - Blue - M-GS61-BU

SKU: WYO-M-GS61-BU
  • Optical Design: Refractor
  • Telescope Aperture: 61mm (2.4")
  • Focal Ratio: f/5.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$398.00
William Optics Guide Star 61 Apochromatic Refractor OTA in Red

William Optics Guide Star 61 APO Refractor Telescope - Red - M-GS61-RD

SKU: WYO-M-GS61-RD
  • Optical Design: Refractor
  • Telescope Aperture: 61mm (2.4")
  • Focal Ratio: f/5.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$398.00
William Optics Guide Star 61 Apochromatic Refractor OTA in Gold

William Optics Guide Star 61 APO Refractor Telescope - Gold - M-GS61-GD

SKU: WYO-M-GS61-GD
  • Optical Design: Refractor
  • Telescope Aperture: 61mm (2.4")
  • Focal Ratio: f/5.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$398.00
William Optics 8x42 Semi APO Binoculars

William Optics 8 X 42 Semi APO Binoculars - H-B8X42ED

SKU: WYO-H-B8X42ED
  • Binoculars by Aperture: 42mm
  • Binoculars by Magnification: 8X
  • Binoculars by Body Size: Standard Binoculars (35mm to 56mm)
  • Weight (ounces): 24
  • Prism Design: Roof Prism
$188.00
William Optics 2" Dura Bright Dielectric SCT Diagonal

William Optics 2" Dura Bright Dielectric SCT Diagonal w/ Built-In Thermometer - D-DIG2D-C-DB-SCT

SKU: WYO-D-DIG2D-C-DB-SCT
  • Diagonal Type: Mirror Diagonal
  • Diagonal Size - Eyepiece Side: 2" Barrel
  • Diagonal Size - Telescope Side: SCT Threads
  • Includes Eyepiece Adapter: Yes, 2" to 1.25"
  • Optics Type and/or Coatings: DuraBright Coatings
$149.00

William Optics Nosepiece for 2" Diagonal - WD-DIG2A

SKU: WYO-WD-DIG2A
  • This nosepiece converts a standard 2" SCT into a "push in" 2" diagonal.

  • To use this tool, replace the SCT adapter with the nosepiece.

  • Please note that this WO nosepiece will not work with 1.25" diagonals or 2" diagonals that have a built-in SCT mounting ring.

  • This is a great way to change your SCT diagonal to a "refractor type" diagonal.
$30.00
William Optics SCT to Flattener 6 Adapter

William Optics SCT to Flattener 6 Adapter - AD4-A015

SKU: WYO-AD4-A015
  • Adapter Connector Type - Side A: Small SCT (2")
  • Adapter Connector Type - Side B: 50 mm x 0.75 Pitch
$28.00
William Optics 2" Dura Bright RotoLock Diagonal

William Optics 2" Durabright RotoLock Diagonal - D-DIG2D-ROTO-A2

SKU: WYO-D-DIG2D-ROTO-A2
  • Diagonal Type: Mirror Diagonal
  • Diagonal Size - Eyepiece Side: 2" Barrel
  • Diagonal Size - Telescope Side: 2" Barrel
  • Includes Eyepiece Adapter: No, 1.25" Eyepiece Adapter Sold Separately
  • Optics Type and/or Coatings: DuraBright Coatings
$198.00
William Optics RotoLock Eyepiece Adapter & Visual Back for 2 WO Diagonals

William Optics RotoLock Upgrade for WO 2" Diagonals - D-ROTO-A2

SKU: WYO-D-ROTO-A2
  • This Rotolock upgrade uses a flange to connect to WO 2" Diagonals.

  • Rotating the ring with lock and unlock the accessories in place.

  • No thumbscrews are used, so users do not have to worry about marring.

  • William Optics' Rotolock upgrade comes with a plastic protective dust cover.
$89.00
William Optics 2" RotoLock Eyepiece Adapter & Visual Back with 48 mm Male Threads

William Optics 2" RotoLock Eyepiece Adapter / Visual Back with 48mm Male Threads - D-ROTO-A2-M48M

SKU: WYO-D-ROTO-A2-M48M
  • This eyepiece adapter is compatible with telescopes and accessories with female 48 mm threads.

  • The other side of the adapter has a standard 2" visual back.

  • Slightly turning the adapter clockwise will lock accessories in place.

  • William Optics' Rotolock Eyepiece adapter's length is 55.5 mm with a 75 mm outer diameter.
$99.00 $89.95
William Optics 2" RotoLock Eyepiece Adapter & Visual Back with 2" SCT Threads

William Optics 2" RotoLock Eyepiece Adapter / Visual Back with SCT 2" Threads - D-ROTO-A2-SCT2F

SKU: WYO-D-ROTO-A2-SCT2F
  • This RotoLock is made to work with Schmidt-Cassegrain telescopes.

  • On one side, the RotoLock has a female 2" SCT thread.

  • The other side has a standard 2" visual back.

  • A simple rotation will lock and unlock accessories into place.
$99.00
William Optics 2" RotoLock Eyepiece Adapter & Visual Back with 3.28" Female Adapter

William Optics RotoLock Eyepiece Adapter / Visual Back with SCT 3.28" Threads - D-ROTO-A2-SCT328F

SKU: WYO-D-ROTO-A2-SCT328F
  • This WO Rotolock Eyepiece Adapter mounts to the 3.28" SCT male threads on most SCTs.
  • Using this adapter will replace the original visual back with one that will accept a WO Rotolock.
  • William Optics has designed the adapter to have threads for 48 mm filters.
  • All you have to do is rotate the adapter ring clockwise to lock in the inserted accessory.
$99.00
William Optics 1.25" Dura Bright Digaonal for Star71 Refractor

William Optics 1.25" Dura-Bright Diagonal for Star71 Telescope - D-125D-WO71

SKU: WYO-D-125D-WO71
  • Diagonal Type: Mirror Diagonal
  • Diagonal Size - Eyepiece Side: 1.25" Barrel
  • Diagonal Size - Telescope Side: M65x1 Male Thread
  • Optics Type and/or Coatings: DuraBright Coatings
$135.00
William Optics 3.5" to 2" RotoLock Visual Back Adapter
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$168.00
William Optics Black Vixen Style Dovetail Plate - 7.9"

William Optics Vixen-Style 7.9" Dovetail Plate - Black - M-PVB

SKU: WYO-M-PVB
  • Type of Mounting Hardware: Dovetails Only
  • Dovetail or Attachment Type: V-Series (Vixen)
  • Dovetail, Saddle or Mount Adapter Length: 7.9"
$39.00
William Optics Soft Carry Case for FLT132 - No Foam

William Optics FLT132 Soft Carry Case - No Foam - BG1-P005

SKU: WYO-BG1-P005
  • Case/Cover Dimensions (LxWxH): 35.4" x 8.3" x 11.02" (900 mm x 210 mm x 280 mm) - External
  • Known to Fit: William Optics FLT132 OTA
$189.00

William Optics Star71 Four Element f/4.9 Imaging Refractor w/2.5" Focuser - A-WO71-II

SKU: WYO-A-WO71-II
  • Optical Design: Refractor
  • Telescope Aperture: 71mm (2.8")
  • Focal Ratio: f/4.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,198.00
William Optics Caon EOS Camera Adapter

William Optics Canon EOS Camera Adapter - AD4-A009-L00BL03

SKU: WYO-AD4-A009-L00BL03
  • DSLR, SLR or Mirrorless Adapters by Brand: Canon
  • Threads: Wide 48 mm T-Mount
  • Diameter: 46 mm
$58.00
William Optics Flat4 Draw Tube Adapter for FLT Telescopes

William Optics Flat4 Draw Tube Adapter for FLT Telescopes - AD4-A006-L00GD03

SKU: WYO-AD4-A006-L00GD03
  • William Optics Flat4 Draw Tube Adapter made especially for the 3" V-Power Focuser
  • Provides improved connection and image circle while preventing vignetting.
  • Removal of the 2" nosepiece enables attachment to William Optics GT102 and FLT132 anniversary model refractor telescopes.
  • Not compatible with earlier model William Optics focusers.
$58.00 $46.40
William Optics GT71 f/5.9 20th Anniversary Gold Triplet Refractor

William Optics GT71 f/5.9 Gold Triplet APO Refractor - 20th Anniversary Edition - A-F71GT-VP20A

SKU: WYO-A-F71GT-VP20A
  • Optical Design: Refractor
  • Telescope Aperture: 71mm (2.8")
  • Focal Ratio: f/5.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$958.00
William Optics SCT Adapter for Standard 2" Diagonal Gold

William Optics SCT Adapter for Standard 2" Diagonal - Gold - D-SCT-TA

SKU: WYO-D-SCT-TA-G
  • This adapter coverts the 2" push-in diagonal into an SCT diagonal.

  • All you have to do is replace the push-in nosepiece with this adapter.

  • WO has designed the adapter to have standard SCT female thread (2" & 24 TPI).

  • This SCT Adapter is anodized gold.
$39.00
William Optics 71 mm f/4.9 Star Imaging Refractor - Blue Edition with Soft Case

William Optics Star71 Four Element f/4.9 Imaging Refractor w/2.5" Focuser - Limited Blue Edition - A-WO71-IIBU

SKU: WYO-A-WO71-IIBU
  • Optical Design: Refractor
  • Telescope Aperture: 71mm (2.8")
  • Focal Ratio: f/4.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$1,198.00

William Optics Zenithstar 61 mm Doublet Refractor Telescope - Blue Edition - A-Z61BU

SKU: WYO-A-Z61BU
  • Optical Design: Refractor
  • Telescope Aperture: 61mm (2.4")
  • Focal Ratio: f/5.9
  • Telescope Mount Type: No Mount - OTA Only
  • Type of Electronics: OTA Only - No Electronics
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$478.00

William Optics provides quality refractors, mounts, and accessories such as eyepieces, diagonals, and mounting hardware for amateur astronomers around the world. The CEO of the company is David Yang, an avid amateur astronomer and bird-watcher who feels strongly about offering premium optics to everyone with an interest in astronomy or nature, and not just to those with plenty of cash to spare.

When William Yang was a child, he thumbed through the pages of Sky & Telescope magazine and gazed at the beautiful images of our universe laid before him. His family could not afford to buy him a telescope, but he could dream of a day when he would be able to photograph galaxies and nebulae like the astrophotographers he admired so much. In 1986, David saved up all summer to buy a telescope to watch Halley's Comet, but before that he tried his hand at building his own telescopes with whatever supplies he could find; he even "borrowed" his grandmother's eyeglasses to use as the lenses for his first refractor!

In 1996, David opened William Optics in Taiwan. Four years later, in 2000, William Optics USA began by offering their break-out 80mm Megrez refractor to consumers in the United States. The quality, as well as the price, was amazing, and before long, William Optics had positioned themselves as one of the world leaders in fast, highly portable quality refractors.

William Optics also makes some great telescope accessories. Their WO Diagonals are celebrated the world over for their machining and optical quality, and their Ultra Wide Angle (UWA) and Super Wide Angle (SWA) eyepieces, with their unusual jet-black insertion barrels, have come to be known for their quality, but at an affordable price. We think William Yang has achieved what he set out to do; providing "More Quality for Less Money"; and we look forward to what he plans to do next!

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