Telescope-Refracting Telescopes-William Optics Gran Turismo 81 APO Refractor with Internal Focus Design – Gold

Introducing the William Optics Internal Focus Design (WIFD)
This new focuser design includes the patented William Optics center focuser with precise internal sliding of fixed optics to prevent image shift. The integrated position viewing window on the focuser provides instant verification of the graduated numerical display. The smooth rack-and-pinion design is incorporated into the focuser to provide super fine adjustability for critical focus. The internal movement of the optical elements is protected from the elements and cannot come out of alignment. The redistribution of weight allows for better balance during imaging sessions.

Outstanding Optics
The Gran Turismo 81 features excellent optics to get the most out of your images. The optical assembly of this refractor is in a triplet configuration, made of FPL-53 apochromatic glass to reduce chromatic aberration and provide excellent contrast, color correction, and sharpness. As mentioned in more detail above, the unique internal focuser design slides otherwise fixed optics to prevent image shift and virtually eliminate vignetting.

Additional Accessories
The William Optics Gran Turismo 81 WIFD comes with several accessories to improve performance and convenience. The Rotolock field rotator allows for precise and convenient orientation of a connected camera. The Bahtinov mask aids in focusing. The optical tube rings and dovetail allow for easy mounting. The included handle doubles as a shoe for attaching small accessories, such as a finder scope. Lastly, a soft carrying case is included to make transportation a breeze!