William Optics Gran Turismo GT 81 WIFD Red (SKU: T-GT81RD-WIFD)

The William Optics Gran Turismo GT 81 WIFD is an exceptional compact apochromat designed specifically for astrophotography enthusiasts. It boasts the latest advancements in optics and features a patented WIFD internal focus system, making it a standout choice in its category.

At the heart of this telescope lies the remarkable three-element APO-ED optics. The production of the low dispersion lens utilizes synthetic fluorite, a material known as FPL-53, renowned for its optical excellence. FPL-53 not only exhibits a high value of the Abbe number but also possesses superior chemical stability compared to natural crystalline fluorite.

The William Optics Gran Turismo GT 81 WIFD stands out with its innovative focuser, the WIFD (William Optics Internal Focus Design), featuring an internal focusing mechanism. This groundbreaking patented solution ensures perfect linearity, even when accommodating large reflex cameras or heavy astronomical cameras, thereby minimizing the risk of unwanted vignetting to zero. Additionally, the focuser is fully compatible with the WO EAF autofocus system, providing a seamless astrophotography experience.

The telescope tube is securely mounted on precisely crafted clamps, complete with a Vixen socket for convenient attachment of a finder or guider.

Key Features of the William Optics Gran Turismo GT 81 WIFD Telescope:

• Apochromatic Triplet with Air Gap and FPL-53 Low Dispersion Element: The telescope employs a three-element APO-ED design, incorporating an air gap and a low dispersion element made from the finest FPL-53 glass. This combination ensures exceptional image quality with minimal chromatic aberration.
• Vignetting-Free WIFD Extractor with Internal Focusing: The telescope's distinguishing feature is its WIFD type extractor, which utilizes internal focusing. This unique design eliminates vignetting and guarantees consistently superior performance, even with larger reflex cameras or heavy astronomical cameras. The extractor is also compatible with the WO EAF autofocus system.
• Solid Assembly Clamps with CNC Technology: The telescope is equipped with precisely manufactured clamps, offering a robust and reliable mounting solution. These clamps are crafted using Computer Numerical Control (CNC) technology to ensure precision and durability.
• WO Saddle Bar Handle Finder Mount with Vixen Foot: The telescope comes with a WO Saddle Bar Handle finder mount, complete with a Vixen foot for easy installation of a finder or guider. This feature enhances the convenience and versatility of the telescope.

Technical Specifications:

• Telescope Optical System: APO-ED Triplet with Air Gap
• Lens Diameter: 81 mm
• Focal Length: 478 mm
• Focal Ratio: f/5.9
• Compatible Flatteners: FLAT6AIII 0.8x / FLAT68III 1x (with WIFD adapter)
• ED Lens Material: FPL-53 Glass
• Compatible Cameras: Full-frame, SLR, Mirrorless, CMOS, CCD
• Compatible Photo Systems (via interchangeable T-rings): Canon EF, Canon RF, Nikon F, Nikon Z, Sony E, Pentax K, Micro 4/3, Fuji X
• Focuser Diameter: N/A
• Focuser Type: Internal Focusing (WIFD)
• Tube Length (Folded): 420 mm
• Tube Length (Unfolded): 500 mm
• Tube Weight: 3.3 kg
• Tube Weight (with Mounting Clamps): 4.5 kg
• Tube Finish: Red

Included Set Elements:

• William Optics Gran Turismo GT 81 WIFD Telescope (Red)
• Bahtinov Mask with Mount
• Lens Cap
• Transport Cover

Warranty:

The William Optics Gran Turismo GT 81 WIFD telescope is backed by a 24-month guarantee, providing peace of mind for your astrophotography endeavors.