William Optics 0.72x Reducer / Adjustable Field Flattener 8 for GT153, FLT 132 & 102GTS
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors.
This high-quality flattener has been engineered and CNC machined for usage with William Optics' GT153, FLT 132, 102GTS, and other APO refractors. This accessory is a must-have for refractor astrophotography.
Lens
- ED Triplet APO Designed to cover full size DSLR cameras with clear lens aperture of 50mm
- STM coated with an excellent doublet air spaced design
- Produced entirely with the best Ohara optical glasses.
- Flattener Power: x0.72
- 45mm for full illuminated imaging circle
Amazing
- It will flatten the field amazingly well for round stars
- This unique flattener works with WO or other f/6 - f/7.8 refractors (please see item diagram above for connection specifications to adapt to other non-WO telescopes)
Superb Finish
- Superb William Optics anodized finish.
- All internal surfaces threaded and blackened for no reflections.
- Protective covers are included on both sides.
Easy to Use
- Will accept any wide T-ring for your camera (Thread size M48x0.75; not for use with smaller M42 T thread adapters with M42x0.75 threads).
- Suitable for GT102, FLT 132, 102GTS (with minimum 3” focuser and our custom made by Feather Touchfocuser) with focuser M92x1.0 thread.
Compatibility:
- Fluorostar 132
- Back Focus: 63.4mm
- Adjust Distance: 8.4mm
- Image Circle: ∅44.4mm
- Fluorostar 156
- Back Focus: 60.8mm
- Adjust Distance: 5.8mm
- Image Circle: ∅44.4mm
- Gran Turismo 102
- Back Focus: 67.1mm
- Adjust Distance: 12.1mm
- Image Circle: ∅44.4mm
- Gran Turismo 153
- Back Focus: 60.4mm
- Adjust Distance: 5.4mm
- Image Circle: ∅44.4mm
Specifications:
- Lens Type: 3 Groups 3 Elements
- Length: 77 mm
- Telescope Thread: M92 x 1 x 7.5 mm
- T-mount Thread: M48 x 0.75 x 4 mm
- T-mount Supported: Canon EF, RF; Nikon F, Z; Sony E; Pentax K; MFT (M4/3); FUJI X
- Camera Format: > Full Frame
- Weight: 1098 g / 2420.67 lbs
Other Information
- Country of Manufacture: Taiwan
Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors.
This high-quality flattener has been engineered and CNC machined for usage with William Optics' GT153, FLT 132, 102GTS, and other APO refractors. This accessory is a must-have for refractor astrophotography.
Lens
- ED Triplet APO Designed to cover full size DSLR cameras with clear lens aperture of 50mm
- STM coated with an excellent doublet air spaced design
- Produced entirely with the best Ohara optical glasses.
- Flattener Power: x0.72
- 45mm for full illuminated imaging circle
Amazing
- It will flatten the field amazingly well for round stars
- This unique flattener works with WO or other f/6 - f/7.8 refractors (please see item diagram above for connection specifications to adapt to other non-WO telescopes)
Superb Finish
- Superb William Optics anodized finish.
- All internal surfaces threaded and blackened for no reflections.
- Protective covers are included on both sides.
Easy to Use
- Will accept any wide T-ring for your camera (Thread size M48x0.75; not for use with smaller M42 T thread adapters with M42x0.75 threads).
- Suitable for GT102, FLT 132, 102GTS (with minimum 3” focuser and our custom made by Feather Touchfocuser) with focuser M92x1.0 thread.
Compatibility:
- Fluorostar 132
- Back Focus: 63.4mm
- Adjust Distance: 8.4mm
- Image Circle: ∅44.4mm
- Fluorostar 156
- Back Focus: 60.8mm
- Adjust Distance: 5.8mm
- Image Circle: ∅44.4mm
- Gran Turismo 102
- Back Focus: 67.1mm
- Adjust Distance: 12.1mm
- Image Circle: ∅44.4mm
- Gran Turismo 153
- Back Focus: 60.4mm
- Adjust Distance: 5.4mm
- Image Circle: ∅44.4mm
Specifications:
- Lens Type: 3 Groups 3 Elements
- Length: 77 mm
- Telescope Thread: M92 x 1 x 7.5 mm
- T-mount Thread: M48 x 0.75 x 4 mm
- T-mount Supported: Canon EF, RF; Nikon F, Z; Sony E; Pentax K; MFT (M4/3); FUJI X
- Camera Format: > Full Frame
- Weight: 1098 g / 2420.67 lbs
Revolutionary new WO x0.72 Adjustable Reducer/Flattener made for f/6 - f/7.8 refractors.
This high-quality flattener has been engineered and CNC machined for usage with William Optics' GT153, FLT 132, 102GTS, and other APO refractors. This accessory is a must-have for refractor astrophotography.
Lens
- ED Triplet APO Designed to cover full size DSLR cameras with clear lens aperture of 50mm
- STM coated with an excellent doublet air spaced design
- Produced entirely with the best Ohara optical glasses.
- Flattener Power: x0.72
- 45mm for full illuminated imaging circle
Amazing
- It will flatten the field amazingly well for round stars
- This unique flattener works with WO or other f/6 - f/7.8 refractors (please see item diagram above for connection specifications to adapt to other non-WO telescopes)
Superb Finish
- Superb William Optics anodized finish.
- All internal surfaces threaded and blackened for no reflections.
- Protective covers are included on both sides.
Easy to Use
- Will accept any wide T-ring for your camera (Thread size M48x0.75; not for use with smaller M42 T thread adapters with M42x0.75 threads).
- Suitable for GT102, FLT 132, 102GTS (with minimum 3” focuser and our custom made by Feather Touchfocuser) with focuser M92x1.0 thread.
Compatibility:
- Fluorostar 132
- Back Focus: 63.4mm
- Adjust Distance: 8.4mm
- Image Circle: ∅44.4mm
- Fluorostar 156
- Back Focus: 60.8mm
- Adjust Distance: 5.8mm
- Image Circle: ∅44.4mm
- Gran Turismo 102
- Back Focus: 67.1mm
- Adjust Distance: 12.1mm
- Image Circle: ∅44.4mm
- Gran Turismo 153
- Back Focus: 60.4mm
- Adjust Distance: 5.4mm
- Image Circle: ∅44.4mm
Specifications:
- Lens Type: 3 Groups 3 Elements
- Length: 77 mm
- Telescope Thread: M92 x 1 x 7.5 mm
- T-mount Thread: M48 x 0.75 x 4 mm
- T-mount Supported: Canon EF, RF; Nikon F, Z; Sony E; Pentax K; MFT (M4/3); FUJI X
- Camera Format: > Full Frame
- Weight: 1098 g / 2420.67 lbs
Other Information
- Country of Manufacture: Taiwan
William Optics 0.72x Reducer / Adjustable Field Flattener 8 for GT153, FLT 132 & 102GTS