Kowa TSN-66S Prominar Spotting Scope 25-60xW Zoom

Kowa TSN-66S Prominar Spotting Scope

The Kowa TSN-66S Prominar is a compact, lightweight spotting scope designed for nature observation and active outdoor use. Despite its small size (365 mm length including eyepiece) and light weight (1500 g), it delivers exceptional detail and clarity typically found in larger, heavier scopes.

It features a 66 mm large fluorite crystal objective lens with advanced optical coatings, providing superior light transmission and virtually eliminating chromatic aberration for natural color reproduction across the entire visible spectrum.

Optical and Mechanical Features

• Fluorite Crystal "Prominar" Lens: Uses an artificially grown monocrystal fluorite lens with ultra-low dispersion to minimize chromatic aberration and color blurring, ensuring ultimate color brilliance.
• Dual Focus Mechanism: Combines quick focus (two revolutions from infinity to 5 meters) with fine focus for precise, razor-sharp image control, especially useful at high magnifications and digiscoping.
• KR Coating: Enhanced coating on the objective lens repels dirt, moisture, and dust, maintaining optical clarity.
• Fully Waterproof and Nitrogen-Filled: The robust 100% magnesium alloy body is sealed and nitrogen-purged, making the scope weatherproof and durable.
• Sun Shade: Smoothly rotating sunshade reduces glare and protects the objective lens from environmental elements.
• Eyepiece Release Button: Redesigned for easy and secure eyepiece changes.
• Filter Thread: 72 mm filter thread allows attachment of protective or UV filters without removing the sunshade.
• Lightweight and Portable: Magnesium alloy construction ensures strength without added weight and reduces internal turbulence for a quiet, clear image.
• Digiscoping Compatibility: Fully compatible with Kowa System accessories, including eyepieces, adapters, and digiscoping equipment for DSLR cameras and smartphones.
• 10-Year Warranty

Included Eyepiece: TE-11WZ II Wide-Angle Zoom

This kit includes the Kowa TE-11WZ II eyepiece with 25x-60x magnification and two XD lenses for excellent sharpness. It is fully waterproof and features a twist-up eyecup with three positions to accommodate both eyeglass wearers and non-wearers for comfortable viewing.

Compatibility and Accessories

The TSN-66S supports a wide range of accessories to expand its functionality:

• Eyepieces: Compatible with TE-11WZ II (25-60x), TE-80XW (35x wide), and others.
• Extender: TSN-EX16 extender increases magnification by 1.6x (e.g., 40-96x with TE-11WZ).
• Astro Adapters: TSN-AS1.25K and TSN-AS1.25G allow use of 1.25" astro eyepieces for celestial observation and photography.
• Digiscoping Adapters: TSN-PA7A for DSLR cameras with T2 ring; TSN-DA10 for Micro Four Thirds cameras with optional adapter rings.
• Smartphone Adapters: Custom protective covers that attach via TSN-AR11WZ adapter ring for photo and video capture.
• Eyepiece Protector: TSN-CV88 prevents scratches and damage during transport and use.

Tripod Compatibility

The TSN-66S features both 1/4" and 3/8" threaded tripod mounts. Using a tripod with a fluid-damped head is recommended for stable, smooth viewing and precise focusing during extended observation sessions.

Technical Specifications

• Objective Lens Diameter: 66 mm fluorite crystal
• Magnification Range: 25x to 60x (with included TE-11WZ II eyepiece)
• Eyepiece Eye Relief: 17 mm
• Exit Pupil: 2.6 mm (at 25x), 1.1 mm (at 60x)
• Field of View: 42 m at 1000 m (25x), 23 m at 1000 m (60x)
• Filter Thread: 72 mm
• Body Material: 100% magnesium alloy
• Weight: Approximately 1500 g
• Length: 365 mm (including eyepiece)
• Waterproof and Nitrogen Purged

Package Contents

• 1x Kowa TSN-66S Prominar Spotting Scope Body
• 1x Kowa TE-11WZ II 25-60x Wide-Angle Zoom Eyepiece
• 1x Objective Lens Cap
• 1x Eyepiece Cap