Kowa - TSN-501 20-40x50 Spotting Scope (Angled Viewing)

A Guide to Birding with Spotting Scopes

At less than 10" long and weighing under a pound, the 45° angled-viewing Kowa TSN-501 20-40x50 Spotting Scope is designed to be your constant companion wherever you go to glass. The moderate 50mm lens and fully multi-coated optics provide bright and clear high-contrast images with accurate color rendition for an immersive observational experience. Its powerful wide zoom range allows you to take in a wide field of view for general viewing purposes, with the ability to draw subjects in close for more detailed observations. This version of the TSN-500 is configured with the eyepiece set at a 45° angle relative to the optical tube to place your head in a comfortable viewing postion whether you're standing, sitting, or lying prone.

Engineered for performance in all conditions, the chassis is made of a lightweight and strong polycarbonate material wrapped in a slip-resistant armoring, with a rubberized and textured zoom collar and focus wheel that make adjustments fast and easy, even when wearing gloves. The optical tube is nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme temperature changes or environmental conditions. To increase your mounting options, the TSN-501 comes outfitted with both a 1/4"-20 and 3/8"-16 tripod attachment—making it compatible with most photo, video, and field tripods on the market.

Optical Performance

Powerful 20-40x zoom eyepiece

50mm aperture

Porro prism optical path

Fully multi-coated optics maximize light transmission through the lens to improve image brightness, color rendition, and contrast

131-92' field of view at 1000 yards

Use and Handling

Eyepiece set at a 45° angle to the optical tube for more comfortable viewing when seated, standing, or lying prong

Integrated aiming sight

Rubberized and textured zoom collar and single-speed focusing wheel

55mm objective lens filter threads

Twist-up eyecup for comfortable use with or without eyewear

3/8"-16 and 1/4"-20 mount to accommodate most photo, video, and field tripods

14-12.5mm eye relief

2.5-1.25mm exit pupil

Construction Details

Lightweight and impact-resistant polycarbonate chassis

Nitrogen filled, IPX6 rated to be waterproof and resistant to internal fogging when moving through extreme temperature changes and conditions

Extremely lightweight: 14 ounces

• At less than 10" long and weighing under a pound, the 45° angled-viewing Kowa TSN-501 20-40x50 Spotting Scope is designed to be your constant companion wherever you go to glass. The moderate 50mm lens and fully multi-coated optics provide bright and clear high-contrast images with accurate color rendition for an immersive observational experience. Its powerful wide zoom range allows you to take in a wide field of view for general viewing purposes, with the ability to draw subjects in close for more detailed observations. This version of the TSN-500 is configured with the eyepiece set at a 45° angle relative to the optical tube to place your head in a comfortable viewing postion whether you're standing, sitting, or lying prone.
Engineered for performance in all conditions, the chassis is made of a lightweight and strong polycarbonate material wrapped in a slip-resistant armoring, with a rubberized and textured zoom collar and focus wheel that make adjustments fast and easy, even when wearing gloves. The optical tube is nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme temperature changes or environmental conditions. To increase your mounting options, the TSN-501 comes outfitted with both a 1/4"-20 and 3/8"-16 tripod attachment—making it compatible with most photo, video, and field tripods on the market.