William Optics GT102 102mm f/6.9 Apo Refractor - 20th Anniversary Edition (Gold)
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Latest version with patented Bahtinov Mask cover!
The new 2018 GT102 three-element super apo telescope 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, CNC carry handle, and Guidescope rings
- Innovative Bahtinov Mask Cover (Patented)
- Soft carrying case
- Retractable dew shield with lock screw
- All-new 3" Victory Edition Crayford design with 360-degree rotatable focuser
- 2 speed knobs 1:10
- Aperture: 102mm F6.9
- Free Vixen-style 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 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-element 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.
- Triple testing each lens by Zygo test to ensure the best optical quality.
Simply Beautiful Finish
- Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube.
- Retractable dewshield and dewshield cap.
- 360-deg rotatable all-new R&P focuser.
- Top quality anodizing.
Attention to Details
- 2" & 1.25" adapter included in the price.
- Anti-marring brass compression rings.
- Mounting rings / dovetail / giodescope rings included.
- 2-year warranty from William Optics.
Specification for William Optics Apochromatic Lenses
All William Optics refractor objectives are double tested and inspected by WO at their factory. These telescopes are free of coma and astigmatism. Since all individual lens surfaces are machine coated, sometimes you may notice minor visual imperfections which will not compromise the optical performance of the telescope. The dimensions of scratches and points shall not exceed the following values:
- Scratches - Maximum Width: 0.025 mm
- Scratches - Maximum Length: 1/4 of total lens diameter
- Scratches - Maximum Quantity: Three
- Dots or Spot Points - Maximum Diameter: 0.4 mm
- Dots or Spot Points - Maximum Quantity: Three
- Accumulation of Defects - Limited Area: 0.8mm^2
- Accumulation of Defects - Total Area: 5.8mm^2
Latest version with patented Bahtinov Mask cover!
The new 2018 GT102 three-element super apo telescope 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, CNC carry handle, and Guidescope rings
- Innovative Bahtinov Mask Cover (Patented)
- Soft carrying case
- Retractable dew shield with lock screw
- All-new 3" Victory Edition Crayford design with 360-degree rotatable focuser
- 2 speed knobs 1:10
- Aperture: 102mm F6.9
- Free Vixen-style 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 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-element 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.
- Triple testing each lens by Zygo test to ensure the best optical quality.
Simply Beautiful Finish
- Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube.
- Retractable dewshield and dewshield cap.
- 360-deg rotatable all-new R&P focuser.
- Top quality anodizing.
Attention to Details
- 2" & 1.25" adapter included in the price.
- Anti-marring brass compression rings.
- Mounting rings / dovetail / giodescope rings included.
- 2-year warranty from William Optics.
Specification for William Optics Apochromatic Lenses
All William Optics refractor objectives are double tested and inspected by WO at their factory. These telescopes are free of coma and astigmatism. Since all individual lens surfaces are machine coated, sometimes you may notice minor visual imperfections which will not compromise the optical performance of the telescope. The dimensions of scratches and points shall not exceed the following values:
- Scratches - Maximum Width: 0.025 mm
- Scratches - Maximum Length: 1/4 of total lens diameter
- Scratches - Maximum Quantity: Three
- Dots or Spot Points - Maximum Diameter: 0.4 mm
- Dots or Spot Points - Maximum Quantity: Three
- Accumulation of Defects - Limited Area: 0.8mm^2
- Accumulation of Defects - Total Area: 5.8mm^2
| Manufacturer | William Optics |
|---|
| Aperture | 102mm |
| Focal Ratio | F/6.9 |
| Focal Length | 703mm |
| Objective designed | 3 elements with FPL53 and ED together |
| Resolving Power | 1.13 arc " |
| Limiting Magnitude | 13.9 |
| Image Circle | Full frame |
| Lens Shade | Retractable |
| Focuser | OD 3" Victory Ed. Crayford focuser, 360° Rotating Camera-angle Adjuster. 1.25" Adapter Included |
| 1.25" Adapter | Brass Compression Rings |
| Tube Diameter | 105mm |
| Mounting Rings | Provided |
| Tube Length | 27" (689mm) Fully Retracted |
| Tube Weight | 11 lbs. (5.0kg) |
| Case | High Quality Soft Case included |
| Case Dimensions (W x H x D) |
31" x 10" x 13 " (78cm x 25m x 34cm) |
Latest version with patented Bahtinov Mask cover!
The new 2018 GT102 three-element super apo telescope 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, CNC carry handle, and Guidescope rings
- Innovative Bahtinov Mask Cover (Patented)
- Soft carrying case
- Retractable dew shield with lock screw
- All-new 3" Victory Edition Crayford design with 360-degree rotatable focuser
- 2 speed knobs 1:10
- Aperture: 102mm F6.9
- Free Vixen-style 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 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-element 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.
- Triple testing each lens by Zygo test to ensure the best optical quality.
Simply Beautiful Finish
- Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube.
- Retractable dewshield and dewshield cap.
- 360-deg rotatable all-new R&P focuser.
- Top quality anodizing.
Attention to Details
- 2" & 1.25" adapter included in the price.
- Anti-marring brass compression rings.
- Mounting rings / dovetail / giodescope rings included.
- 2-year warranty from William Optics.
Specification for William Optics Apochromatic Lenses
All William Optics refractor objectives are double tested and inspected by WO at their factory. These telescopes are free of coma and astigmatism. Since all individual lens surfaces are machine coated, sometimes you may notice minor visual imperfections which will not compromise the optical performance of the telescope. The dimensions of scratches and points shall not exceed the following values:
- Scratches - Maximum Width: 0.025 mm
- Scratches - Maximum Length: 1/4 of total lens diameter
- Scratches - Maximum Quantity: Three
- Dots or Spot Points - Maximum Diameter: 0.4 mm
- Dots or Spot Points - Maximum Quantity: Three
- Accumulation of Defects - Limited Area: 0.8mm^2
- Accumulation of Defects - Total Area: 5.8mm^2
| Manufacturer | William Optics |
|---|
| Aperture | 102mm |
| Focal Ratio | F/6.9 |
| Focal Length | 703mm |
| Objective designed | 3 elements with FPL53 and ED together |
| Resolving Power | 1.13 arc " |
| Limiting Magnitude | 13.9 |
| Image Circle | Full frame |
| Lens Shade | Retractable |
| Focuser | OD 3" Victory Ed. Crayford focuser, 360° Rotating Camera-angle Adjuster. 1.25" Adapter Included |
| 1.25" Adapter | Brass Compression Rings |
| Tube Diameter | 105mm |
| Mounting Rings | Provided |
| Tube Length | 27" (689mm) Fully Retracted |
| Tube Weight | 11 lbs. (5.0kg) |
| Case | High Quality Soft Case included |
| Case Dimensions (W x H x D) |
31" x 10" x 13 " (78cm x 25m x 34cm) |