William Optics Gran Turismo 81 IV APO Refractor (Specify Color)
Article number: | A-F81GTIVXX |
Availability: | More on the Way to us |
Delivery time: | More on the Way to Us |
The William Optics Gran Turismo 81mm refractor features a CNC machined optical tube with an immaculate white finish and Trim color of your choice. Internally, this refractor contains a 3-element objective using high-quality FPL-53 extra-low dispersion glass to reduce any secondary spectrum to an incredible extent. The three element apochromatic design and FPL-53 glass provide superior optical performance and excellent aberration correction. This 81mm OTA from William Optics comes with a 2.5" Rack & Pinion Focuser, a camera angle rotator, CNC Handle Bar, Bahtinov Mask, Mounting Rings, and Dovetail. Mount this OTA package to a mount and tripod, and you are all set for a fantastic visual observation or imaging session!
William Optics has included a 2.5" Rack & Pinion focuser to for smooth and stable focusing. The design ensures astrophotographers do not need to worry about image shifting. This focuser comes with 1:10 dual-speed and super smooth 360º rotation. William Optics has included two locking screws on angled positions for operations with heavy-duty payloads and a large aluminum knob with built-in thermometer. Attached to the 2.5" R&P focuser is a WO camera angle rotator to help you get that perfect focus for beautiful celestial images. As an added bonus for focusing, William Optics has added the innovative Bahtinov mask cover!
With the William Optics CNC Handle Bar, this already portable telescope has a sturdy handle to help carry the OTA around to your favorite gazing spot. Not only is this handle bar functional as a handle, it also acts a slide base for compatible guiding accessories. This handle bar perfectly fits William Optics slide base 50mm guide rings and the WO UniGuide 50mm Guide Scope (both are not included).
The William Optics DSD 210mm (8.27") dovetail plate has both a Vixen and Arca Swiss size at each end of the plate. The plate has two 1/4-20 threaded holes.
William Optics Gran Turismo 81 APO Refractor Specifications
- Aperture: 81mm
- Focal Length: 478mm
- Focal Ratio: f/5.9
- Focuser: 2.5" Rack & Pinion Focuser
- Color: Powder White with Space Gray Accents
- Length when Fully Extended: 460mm
- Length when Fully Retracted: 390mm
- Weight: 8.59 lbs.