Gran Turismo 81 Internal Focus Design (WIFD) Apochromat

Gran Turismo 81 Internal Focus Design (WIFD) Apochromat - View 3

Gran Turismo 81 Internal Focus Design (WIFD) Apochromat - View 4

Gran Turismo 81 Internal Focus Design (WIFD) Apochromat - View 5

Gran Turismo 81 Internal Focus Design (WIFD) Apochromat - View 6

$1378.62 ~~$1998~~ In stock

Category: Refractor Telescope

Description

Explore Stellar Phenomena with Precision: The William Optics Gran Turismo 81 WIFD

Unveil the mysteries of the night sky with the William Optics Gran Turismo 81 WIFD, a superb refractor telescope designed for discerning astronomers who demand high-quality optics and robust build quality. This exquisite telescope is part of our renowned Gran Turismo series, known for combining exceptional performance with stunning aesthetics.

Outstanding Features:

Superior Optical Quality: The GT 81 WIFD features a triplet apochromatic lens with extra-low dispersion (FPL-53) glass from Ohara, Japan, ensuring outstanding clarity and sharpness with virtually no chromatic aberration.
Enhanced Durability and Precision: Engineered with a precision-machined, ultra-durable housing, this telescope is designed to withstand the rigors of frequent use while maintaining optimal alignment of its optical elements.
Advanced Focusing System: Equipped with our proprietary WIFD (William Optics Internal Focusing Design), this model offers a seamlessly smooth focusing experience, perfect for both astrophotography and serious star-gazing.
Aesthetically Pleasing Design: The Gran Turismo 81 not only performs beautifully but looks the part too, featuring a sleek, retractable dew shield and a glossy white finish with gold trim that embodies elegance and sophistication.

Specifications

Lens Type: Triplet Apochromatic Prime Lens
Focal Length: 478mm
Diameter: 81mm
Aperture: f/5.9
Image Circle: 45mm
Focuser: WIFD R&P Focuser, compatible with EAF
Adapter Included: M92 Rotator, M92 -> M63 adapter
Optional Flattener: FLAT6AIII 0.8x, FLAT68III 1.0x (requires adapter), FLAT GT (requires adapter)
Camera Format: Full Frame, DSLR | APS-C, M4/3
Tube Length: 420mm - 500mm
OTA Weight: 3.58kg / 7.89lbs
Total Weight: 4.56kg / 10.05lbs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Ruby E. ★★★★★ Oct 21, 2026

Set it up last night and the first thing I noticed was how sharp the stars looked even at higher magnification. The apochromatic design really kills that false color I used to struggle with. Can't wait to try it on some double stars.

Ryan R. ★★★★★ Oct 20, 2026

The internal focus design is a game-changer—adjusting focus without shifting the telescope’s center of gravity means I can fine-tune views of Jupiter’s cloud bands without rebalancing the mount. Even at high power, the apochromatic optics deliver crisp, color-free stars across the entire field.

Violet ★★★★★ Oct 19, 2026

Finally got this set up on my mount and the internal focus design is buttery smooth — no image shift at all when fine-tuning focus. First clear night I spent two hours just scanning the Orion Nebula and the star images stayed pin-sharp across the whole field.