1. Final Announcement: We're Saying Goodbye to AstronomyConnect. Read Our Closing Notice.
Dismiss Notice
New Cookie Policy
On May 24, 2018, we published revised versions of our Terms and Rules and Cookie Policy. Your use of AstronomyConnect.com’s services is subject to these revised terms.

More Views

William Optics GT102 102mm f/6.9 Apo Refractor w/ DDG Focuser # A-F102GT-DDG

4.8 (4 Reviews) Read Reviews Write Review
Brand William Optics
Part Number A-F102GT
Availability available

Product Info

Manufacturer Description

The GT 102 three-element super apo from William Optics offer superb quality for imaging and visual use at an affordable price.

The package includes:

  • GT 102 three element design with FPL-53 and other ED element glass
  • Tube mounting rings
  • Retractable dew shield
  • 2" DDG focuser design with 360-degree rotatable focuser
  • 2 speed knobs 1:10 
  • Aperture: 102mm F6.9
  • Free dovetail plate
  • Weight: 11 lb; length: 27"

The stunning new William Optics GT 102 APO is the new jewel of the apochromatic refractor world. From the pristine white finish on the CNC to the elegant gold trim, this beauty has more than just good looks. The new GT 102 features a 3-element objective using high-quality FPL-53 glass and combined with other extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.

Optically Unbeatable

  • Three-elment air-spaced primary objective (FPL-53) in adjustable CNC machined ultra high precision lens cell.
  • Extremely sharp with excellent color correction.
  • Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.
  • This f/6.9 is geat for astrophotography.

Simply Beautiful Finish

  • Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, gold finish,
  • Retractable dewshield and dewshield cap.
  • 360-deg rotatable focuser with DDG (Digital Display Gauge).
  • Top quality anodizing.

Attention to Details

  • 2" & 1.25" adapter included in the price.
  • Anti-marring brass compression rings.
  • Mounting rings / dovetail are included.
  • 2-year warranty from William Optics.

Reviews

4.8 (Based on 4 Reviews) 100% of reviewers recommended this product.
Rating Distribution
Sort by
  • Date
  • Rating
  • Useful
    1. AstroGuy1

      AstroGuy1 New Member

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by t6
      1525275979
      May 2, 2018

      4.0 William Optics GT102 102mm f/6.9 Apo Refractor - 20th Anniversary Edit

      Pros:

      Cons:

      Comments:

      Very nice scope, looks fantastic and works perfectly. The scope was delivered in a box with the case and scope inside. The case is a nice, well made, padded soft side case.

      I did have an issue with the focuser, as several screws were very loose and one screw even fell out onto the table as I was removing the plastic bag from around the scope. In addition, the fine focus knob was dragging on the course focus knob causing a horrible grinding sound. The fixes for these issues were simple, but still not what one would expect from WO.

      Once these minor issues were resolved the scope performed spectacularly. Crystal clear visual images.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Charles L.
      1525116582
      Apr 30, 2018

      5.0 Amazing Optics

      Pros:

      Cons:

      Comments:

      Amazing Optics

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Michael M.
      1483017357
      Dec 29, 2016

      5.0 WO GT102

      Pros:

      Cons:

      Comments:

      This is my first 'serious' refractor and I decided on the WO after a lot of online research and questioning other users. This is a quality piece of glass - images are clear and sharp to the edge of the field, stars are pinpoints, and contrast is great. Star colors really pop. Stock focuser is well built and stable. Fit and finish is outstanding. My only real complaint is that the dovetail should have been longer and have a screw stop to prevent the OTA from accidentally slipping off the mount. I was able to rectify the issue by attaching a couple of 1.25" M6 screws on the bottom of the top ring. There are also no instructions with the unit - you can get most of the info on the WO website but you need to refer to the GFT102.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by CJMagiera of Western MA.
      1375833600
      Aug 6, 2013

      5.0 GT 102 exceeding expectations

      Pros:

      Strong Construction,Quality Lenses

      Cons:

      Comments:

      Sweet 3 element APO. Visibly sharper with no detectable CA in a comparison with a stellarvue ED two element. And this was confirmed by avid and experienced amateurs with very expensive glass preferences. No idea how she'll perform in an AP environment. Can push mag up to my limit of eyepieces (4mm) with no issues, truly limited by seeing and other conditions. For visible, I'm impressed and very happy with my purchase.

      Added bonus is quality of fit and finish, return calls for questions by Agena and WO people, and personal pride in owning first high end optical instrument. Thank you all

      CJ Magiera

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    Sort by
    • Date
    • Rating
    • Useful

      Specifications

      Telescope Aperture 4.02" (102mm)
      Manufacturer William Optics
      Telescope Aperture 81mm - 125mm
      Telescope Series William Optics GT