William Optics RedCat 71 mm APO 350 mm f/4,9 (SKU: T-C-71RD)

The William Optics RedCat 71 APO 350 is an astrograph that stands out among its competitors due to its exceptional field correction and superior control of chromatic aberrations, making it a top choice for professional use.

At the core of this telescope lies the four-element Petzval APO-ED optics. The low-dispersion lens is crafted from synthetic fluorite, an incredibly precise optical material. Renowned Japanese company Ohara produces this material, known as FPL-53, which not only boasts a high Abbe number but also offers greater chemical stability compared to natural crystalline fluorite.

What sets this astrograph apart is not just the quality of its materials but also its technologically advanced optical system design. Thanks to patented solutions by Williams Optics, this instrument provides a perfectly flat field without requiring additional equalizers.

The telescope's tube is securely mounted on precision-made clamps, featuring a Vixen socket for attaching a finder or guider, as well as a Vixen/Arca-Swiss foot.

For additional information, please visit the manufacturer's website: https://williamoptics.com/redcat-71

Key Features of the William Optics RedCat 71 APO 350 refractor:

• Apochromatic quadruplet in the Petzval system with an air gap and a low-dispersion element made of Japanese FPL-53 glass (synthetic fluorite).
• Unique lens system ensuring excellent image quality and a flat field without the need for a flattener or focus reducer (patent by William Optics).
• Large diameter full illumination wheel allowing compatibility with cameras equipped with full-frame sensors.
• Ultra-precise, locking helical focuser.
• CNC technology-based optical tube clamps.
• Mounting foot compatible with Vixen and Arca-Swiss sockets, enabling mounting on a mount or photographic tripod.

Technical Specifications:

• Telescope optical system: APO ED quadruplet (Petzval) with an air gap.
• Lens arrangement: 2 - 1 - 1.
• Objective diameter: 71 mm.
• Focal length: 348 mm.
• Focal ratio: f/4.9.
• ED lens material: FPL-53 glass (Ohara, Japan).
• Full illumination circle diameter: 45 mm.
• Compatible sensor sizes: APS-C, full frame.
• Focuser: Helical with rotator.
• Camera mounting thread: M48x0.75.
• Finder foot: Vixen.
• Mounting for mounting: Vixen/Arca-Swiss.
• Tube length (extended): 435 mm.
• Tube weight (without accessories): 2.8 kg.
• Tube finish: Red.

Kit Components:

• William Optics RedCat 71 APO 350 refractor.
• Dew shield.
• Bahtinov mask with mount.
• Lens cap.
• Fixing clamps with Vixen/Arca-Swiss foot.
• Transport cover.

Warranty:

This product comes with a 24-month guarantee.