Kowa PROMINAR TSN-88S ZM SET with VEO 5 264CV14 Spotting Scope Kit

PROMINAR Optics: The 88mm Pure Fluorite Crystal Objective

At the core of the TSN-88S is an 88 mm objective lens crafted from pure fluorite crystal. Unlike optical glass, fluorite has exceptionally low dispersion characteristics that virtually eliminate chromatic aberration, or color fringing. This ensures that colors remain true and details stay sharp, even at the highest 60x magnification and on high-contrast subjects like birds against a bright sky.

Kowa pairs the fluorite element with an XD concave lens and has improved the optical coatings applied not only to the lenses but also to the prism. The result is higher light transmission than the previous model across the entire color spectrum, which helps in the low light of dawn and dusk. The objective lens is further protected by an upgraded Kowa KR coating, which repels dirt, moisture and dust from building on the surface.

Rugged Mechanics: Magnesium Alloy Body and Dual-Speed Focus

The TSN-88S is built for a lifetime of use in the field. Its body is constructed from a 100% magnesium alloy, which Kowa describes as widely held to be the lightest practical-use metal. Kowa says this makes the scope tougher and lighter than its predecessor; the body weighs 3.26 lb. The shell is fully waterproof and nitrogen sealed, which guards against internal fogging.

Controlling the view is a dual focus knob with a two-step mechanism. When a subject is well out of focus, the quick focus brings it into focus 3 times faster than the fine focus, in just a few smooth revolutions. The fine focus offers pinpoint control, allowing for subtle adjustments to achieve critical sharpness, which is essential for digiscoping and identifying fine details at a distance.

Included Eyepiece: The TE-11WZ II 25-60x Wide Angle Zoom

This kit includes the versatile TE-11WZ II, a wide-angle zoom eyepiece that delivers magnifications from 25x to 60x. It provides a generous field of view that spans from 138 ft to 75 ft at 1,000 yards, allowing you to easily locate a subject at low power before zooming in for a closer look. It has 17 mm of eye relief and weighs 0.80 lb.

The TSN-88S body uses a secure bayonet mount with a push-button release, allowing for quick and easy eyepiece changes. While the TE-11WZ II covers most situations, the system is also compatible with other Kowa eyepieces, such as the TE-80XW for an extremely wide 35x fixed-power view and the TE-20H long eye relief eyepiece, expanding the scope's capabilities for specialized observation.

Field-Ready Support: The Vanguard VEO 5 264CV14 Tripod

A stable platform is critical for high-magnification viewing, and this kit includes the Vanguard VEO 5 264CV14 carbon fiber tripod, which Kowa recommends for its larger TSN-88 and TSN-99 PROMINAR models. This full-sized tripod is engineered for rigidity and portability, with 26mm diameter carbon fiber legs that provide a solid base while keeping the carry weight manageable. It supports up to 17.6 lbs, more than enough for the scope and any digiscoping accessories.

The included VEO PV-14 fluid 2-way video head ensures smooth, controlled movements, which is ideal for tracking moving wildlife or panning across a landscape. Counterbalancing spring assist helps smooth out tilting movements, and a long pan handle with independent pan/tilt locks gives controlled operation. The tripod offers three adjustable leg angles (23°, 50°, and 80°) and rubber feet that convert to built-in spikes for secure footing on rock, dirt or soft ground.

Straight-Through Design: A 326 mm In-Line Optical Path

The TSN-88S features a straight body design, where the eyepiece is in a direct line with the objective lens. It is the straight viewing version of the TSN-88 PROMINAR and measures 326 mm in length; Kowa also makes this kit with the angled TSN-88A. Kowa does not rank one body type above the other, so the choice is a matter of personal preference.

To aid in aiming, a sight is built into the sliding lens hood, which helps you find a distant target that is hard to locate before looking through the eyepiece. Slide the hood away from the body to protect the lens from rain or to keep direct sunlight from entering the scope.

Expandable System for Digiscoping and 95mm Filters

The TSN-88S is designed as the core of a larger optical system. Kowa calls the TSN-88 PROMINAR the king of digiscoping and lists this kit as ideal for digiscoping with a camera or smartphone. An accessory collar on the body takes Kowa digiscoping adapters such as the TSN-PA7 and TSN-DA10, which are used with the TE-11WZ II eyepiece and turn the scope into a super telephoto lens for DSLR and mirrorless cameras.

The front of the objective lens is threaded to accept 95 mm filters. This allows you to attach the Kowa TP-95FT protection filter, made for the TSN-99 and TSN-88 PROMINAR scopes, which carries Kowa KR coating to repel dirt and moisture and helps protect the objective lens from harsh environments. Kowa also makes the C-88S-N neoprene case for the TSN-88S.

Kowa TSN-88S vs. TSN-99S: Aperture and Portability Trade-offs

The 88 mm TSN-88S is part of Kowa's flagship PROMINAR line, which also includes the larger 99 mm TSN-99S. The primary difference is light-gathering ability and size. Both use a pure fluorite crystal objective and a magnesium alloy body, so the choice between them involves a trade-off.

• Kowa TSN-88S: With its 88 mm objective, 326 mm length, and 3.26 lb weight, this model is the lighter and more compact of the two, and easier to carry on long hikes.
• Kowa TSN-99S: The larger 99 mm objective gathers more light. However, this comes at the cost of size and weight: the TSN-99S is longer and heavier.