Kowa PROMINAR TSN-99S ZM SET with VEO 5 264CV14 Spotting Scope Kit

The 99mm PROMINAR Objective: Pure Fluorite Crystal and XD Glass

At the heart of the TSN-99S is a massive 99 mm objective lens crafted from pure fluorite crystal. Fluorite crystal virtually eliminates chromatic aberration (color fringing) in the visible light range, giving exquisite detail. This helps you resolve subtle feather details and identify subjects in low light.

Kowa pairs the fluorite element with a Kowa XD concave lens and improved optical coatings, a combination Kowa says virtually eliminates chromatic aberration even at high magnification. This combination delivers a view that is true-to-life, allowing you to enjoy true-to-life colors, light and shadows as they exist in nature, without the false color that can obscure critical details at high magnification.

Dual Focus System: From 6m to Infinity in Two Revolutions

The TSN-99S features Kowa's signature dual-focus mechanism, providing both speed and precision in a two-step focus knob, one part for quick focusing and one for fine focusing. The quick focus brings the object into focus 3 times faster than the fine focus and moves from the minimum distance of 6 m to infinity in only two revolutions, allowing you to rapidly acquire subjects at different distances. This is essential for tracking birds in flight or scanning a dynamic landscape.

Once you have a rough focus, the fine focus offers delicate control for achieving critical sharpness. This level of precision is vital when observing at the maximum 70x magnification or when capturing high-resolution images through the scope (digiscoping). The manual says the system allows a smooth transition from quick focusing to fine adjustment.

30-70x Magnification: The Versatility of the TE-11WZ II Eyepiece

This kit includes the Kowa TE-11WZ II wide angle zoom eyepiece, transforming the TSN-99S body into a complete viewing system. It delivers a versatile magnification range of 30-70x, allowing you to scan a wide area at low power and then zoom in for detailed inspection. The field of view is generous, ranging from 115 ft at 30x to 66 ft at 70x (measured at 1,000 yards).

Kowa gives the TE-11WZ II an eye relief of 17 mm and a weight of 0.80 lb. The bayonet mount features a quick release button for attachment and removal, allowing you to swap in the other Kowa eyepieces listed for the TSN-99: the TE-80XW extreme wide angle eyepiece (40x on this body) and the TE-20H long eye relief eyepiece.

Field-Ready Construction: A 4.04 lb Magnesium Alloy Body

Despite its large 99 mm objective, the TSN-99S body is remarkably lightweight at just 4.04 lb. This is achieved through a 100% magnesium alloy chassis created using a sophisticated thixotropic molding process. The result is a structure with the strength and rigidity of metal but at a significantly reduced weight, making it more portable than many other large objective models.

The body is built to withstand harsh environments and features Kowa's proprietary KR coating on the objective lens. This coating actively repels dirt, moisture, and dust from building on the surface. The scope also includes a twist-out sunshade that protects the lens from rain and keeps direct sunlight from entering, and an integrated aiming sight for locating a subject that is difficult to find.

Vanguard VEO 5 264CV14 Tripod: 17.6 lb Capacity Carbon Fiber Support

This kit includes the Vanguard VEO 5 264CV14, a full-sized carbon fiber tripod with a fluid 2-way video head, which Kowa recommends for its larger TSN-88 and TSN-99 PROMINAR models. Vanguard rates it to support up to 17.6 lbs with a carry weight of approximately 4 lbs.

The VEO PV-14 fluid 2-way head is designed for precise control during motion, whether you are tracking subjects or glassing across terrain. Key features include:

• Carbon Fiber Legs: 26mm diameter legs enhance stability for larger optics.
• Fluid Motion Control: A counterbalancing spring assist smooths tilting movements, and a long pan handle with independent pan/tilt locks gives controlled operation.
• All-Terrain Stability: Three adjustable leg angles (23°, 50°, 80°) and rubber feet that convert to built-in spikes give secure footing on rock, dirt or soft ground.
• ARCA-Compatible Plate: The QS-71P quick-release plate ensures fast and secure mounting for the spotting scope.

System Integration: 105mm Filter Thread and Digiscoping Collar

The TSN-99S is designed as the core of a complete optical system. The front of the objective housing features a 105 mm filter thread, allowing you to attach Kowa's optional TP-105FT protection filter. This filter features Kowa KR coating to repel dirt and moisture and helps protect the objective lens from harsh environments.

For photographers, an easy-access accessory collar on the scope body allows for the rapid attachment of Kowa's digiscoping adapters. With the eyepiece removed, unscrew the protective ring (counter-clockwise) to attach an adapter and transform the spotting scope into a super telephoto lens system. Kowa describes this kit as ideal for digiscoping with a camera or smartphone.

Kowa TSN-99S vs. TSN-88S: The 99mm Aperture

While both the TSN-99S and its 88mm sibling, the TSN-88S, use pure fluorite crystal objectives, the 99mm aperture of this model gathers about 26% more light than the 88mm lens, providing a brighter image at dawn and dusk.

With the TE-11WZ II, Kowa lists 30-70x on the TSN-99 and 25-60x on the TSN-88. The trade-off for the larger aperture is a bigger, heavier body: the TSN-99S body weighs 1835 g (4.04 lb).