The TSN-883 Angled 88mm PROMINAR PFC Spotting Scope is a world-class spotter that redefines the standards of color brilliance, sharpness, and brightness.
Kowa Prominar 88mm with 25-60x eyepiece Spotting Scope
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The TSN-883 uses an element of pure fluorite crystal (PFC) glass in its construction, which greatly minimizes chromatic aberration. This ensures maximum efficiency in its light-gathering, producing a clear visual range and sharp imagery that traditional glass lenses cannot attain at their highest magnifications and with the strongest of subject/background contrast changes. Fluorite is extremely expensive, but the subtle difference between the viewing from the PROMINAR-equipped TSN-883 and even the very best normal scopes would be apparent even to a novice. Kowa's use of their patented C3 prism multi-coating process increases image brightness significantly over their prior-generation models that featured flourite.
The 883's housing is made of a magnesium alloy that defines maximum durability and lightweight construction, resulting in a compact, ergonomic, and functional design for extreme nature and outdoor enthusiasts wanting only the very best. It sets a benchmark for the combination of the large objective with small weight and mass.
As the angled viewing model of Kowa's flagship line, this scope makes sharing the viewing among multiple observers quite easy and is also generally considered more comfortable for longer glassing sessions. An angled scope allows for a slightly smaller, shorter tripod and requires a bit more experience to quickly locate the subject in the scope.
| Waterproof Nitrogen Filled | Magnesium Alloy Robust |
![]() Low Light Dawn / Dusk | ![]() Large Objective Super Bright |
| Fluorite Crystal Ultimate Quality | Dual Focus Total Precision |
COLOUR, THE WAY NATURE INTENDED.
When crafting the new TSN-88 PROMINAR series, Kowa went back to its routes in optical design. Routes which have made it one of the most popular spotting scope manufacturers in the world.
To enhance a basic fundamental feature that PROMINAR users enjoy every time they look through their eyepiece - Natural Colour.
Kowa has always prided itself on manufacturing optics that deliver a pure rendition of the view in front of the lens. Allowing you, the observer to explore and enjoy every detail of the subject.
An image free of negative optical distractions allowing you to immerse yourself into the scene in front of you.
PURE FLUORITE CRYSTAL OBJECTIVE
The new TSN-88 PROMINAR features an 88mm pure fluorite crystal objective lens - the true optical powerhouse at the heart of all PROMINAR flagship optics. This unique lens redefines the standards of colour brilliance and eliminates chromatic aberration for one of the most detailed views of the natural world.
HIGHER TRANSMISSION
Kowa engineers have improved the unique optical coatings applied not only to the lenses but also the prism in the new TSN-88 PROMINAR spotting scope series. The result is a spotting scope that delivers even higher levels of light wavelength transmission than its predecessor and most important of all, across the entire colour spectrum for the most natural colour of nature.
TOUGH, LIGHTWEIGHT & PORTABLE
The TSN-88 PROMINAR now benefits from a 100% magnesium alloy structure, making it not only tougher but also lighter than its predecessor. A fully waterproof and nitrogen sealed shell plus an upgrade of Kowa KR coating applied to the objective lens which repels dirt, moisture and dust from building on the surface, makes the scope reassuringly rugged.
DUAL FOCUS PIN POINT CONTROL
The dual focus mechanism is the gateway to controlling the image between your eye and the scope. Exquisite engineering is refined to make operation flawless. Quick focus allows for fast action to bring your subject in to detail in just a few smooth revolutions, whilst Fine focus gives pin-point, finger-tip control offering the ultimate in focussing accuracy.
LOOKS AREN’T EVERYTHING, BUT…
The TSN-88 PROMINAR adopts the new ergonomic curves and form created for the recent TSN-99 PROMINAR scope series. Th ere is no mistaking this spotting scope is PROMINAR. Classic green with new and improved elegant styling and a comfortable shape designed to give the user the best experience and operation out in the field.
STILL THE KING OF DIGISCOPING
The TSN-88 PROMINAR retains its crown in the world of digiscoping, offering the photo enthusiast ultra long range telephoto photography options not possible in conventional photography. The improved coatings further enhance digiscoping performance even at the highest levels of magnification producing images that were once only achievable with high end DSLR systems. Kowa has an enviable line-up of dedicated and universal smartphone adapters to allow simple connection of most smartphone models to the TSN-88 PROMINAR, take highly magnified and detailed images and videos with your smartphone of the natural world.
DUAL TRIPOD MOUNT
A new dual tripod mounting system prevents the scope from slipping or rotating on the tripod shoe ensuring extra stability for long periods of use. A game changer for ultimate convenience and handling out in the field.
AIMING SITE
The spotting scope includes a new detachable aiming site that can be fixed on to the accessory collar to assist in locating your subject more rapidly. The lens hood also features a newly designed built in aiming site as a further visual aid.
- Extremely bright 3.5" objective lens garners a better view in any lighting
- PROMINAR fluorite crystal objective lens element
- Magnesium alloy construction aids weight/brightness ratio
- Body's colour tone won't alarm wildlife
- Phase-corrected Schmidt-Pechan prism with C3 dielectric prism coating, superior to aluminium, mirror, and silver-backed prism systems
- Dual-speed coarse/fine focusing system
- Rotating tripod collar with detented intermediate stops
- Extreme water and fog-proof performance (JIS protection class 7)
- Multiple available specialty eyepieces
- Quick-aiming sightline aids in object locating
- Sliding, rubber armored sunshade (with 95mm filter thread) shields objective from rain and stray light
- Easily adapted to SLR cameras, digital point & shoot cameras, and video cameras with optional accessories
Specifications of Scope:
| What’s in the Box — TSN-88A (Angled) & TSN-88S (Straight) | |
|---|---|
| Scope Body | Kowa TSN-88A (Angled, 45°) or TSN-88S (Straight) |
| Eyepiece (Included) | Kowa TE-11WZ II 25–60× Wide Zoom (bayonet fit) |
| Caps & Covers | Objective lens cap, eyepiece front & rear caps, body mount cap (as applicable) |
| Printed Materials | User manual / quick start, warranty information |
| Accessories (Typical) | Cleaning cloth |
| TSN-88A / TSN-88S — Body Specifications (without eyepiece) | |
|---|---|
| Viewing Angle | Angled (TSN-88A, 45°) or Straight (TSN-88S) |
| Objective Lens | Ø 88 mm PROMINAR pure fluorite crystal objective |
| Minimum Focus Distance | 5.0 m (16.4 ft) |
| Focusing | Dual-speed focus (quick & fine) |
| Body Material / Finish | 100% Magnesium alloy chassis, protective armor |
| Water & Fog Proofing | Nitrogen-purged; fully waterproof construction |
| Filter Thread | 95 mm |
| Length | TSN-88A: 342 mm (13.5"); TSN-88S: 326 mm |
| Weight (Body Only) | TSN-88A: 1460 g; TSN-88S: 1480 g |
| Mount | Dual tripod mount (1/4" & 3/8") with anti-rotation; rotating collar (on 88A) |
| Eyepiece Mount | Kowa bayonet; accepts TE-series eyepieces & TSN-EX16 1.6× extender |
| TSN-88A / TSN-88S with TE-11WZ II 25–60× Wide Zoom — Specifications | |
|---|---|
| Magnification | 25–60× |
| Apparent Field of View | 55° – 69° |
| Field of View @ 1000 m | 42 – 23 m (126 – 69 ft @ 1000 yd) |
| Exit Pupil (TSN-88) | 3.5 – 1.5 mm (across zoom range) |
| Relative Brightness | 12.3 – 2.3 |
| Twilight Factor | 46.9 – 72.7 |
| Eye Relief | 17 mm |
| Dimensions (Body) | TSN-88A: 342 mm; TSN-88S: 326 mm |
| Total Weight (Scope + Eyepiece) | TSN-88A Kit: 1840 g; TSN-88S Kit: 1860 g |
| Eyepiece Dimensions/Weight | Ø 55 mm × L 87–111 mm; ~380 g — TE-11WZ II |
| TE-11WZ II 25–60× Wide Zoom — Eyepiece Specifications | |
|---|---|
| Magnification | 25–60× on TSN-88/77; 28–66× on TP556 |
| Apparent Field of View | 55° – 69° |
| Field of View @ 1000 m | 42 – 23 m (TSN-88/77); 38 – 21 m (TP556) |
| Exit Pupil | 3.5 – 1.5 mm (TSN-88) |
| Eye Relief | 17 mm |
| Dimensions / Weight | Ø 55 mm × L 87–111 mm; ~380 g |
| TSN-88A / TSN-88S — Specifications with Other Eyepieces [SOLD SEPERATELY] | ||||
|---|---|---|---|---|
| Eyepiece | Magnification on TSN-88 | Field of View (actual) | Eye Relief | Weight |
| TE-11WZ II (Included) | 25–60× | 42–23 m @ 1000 m | 17 mm | ~380 g |
| TE-80XW (Extreme Wide) | 35× (fixed) | 45 m @ 1000 m | 17 mm | ~485 g |
| TE-20H (Long Eye Relief) | 25× (fixed) | N/A | Long eye relief | ~360 g (approx.) |
| TSN-EX16 1.6× Extender — Magnification on TSN-88 [SOLD SEPERATELY] | |||||
|---|---|---|---|---|---|
| Eyepiece | Base Mag. | With EX16 (×1.6) | Base Exit Pupil | Exit Pupil w/ EX16 | Notes |
| TE-11WZ II (zoom) | 25–60× | 40–96× | 3.5–1.5 mm | ~2.2–0.9 mm | Higher power for long-range detail; steady tripod recommended |
| TE-80XW (fixed) | 35× | 56× | ~2.5 mm | ~1.6 mm | Stays wide & bright; great for distant shorebirds / astronomy |
| TE-20H (fixed) | 25× | 40× | ~3.5 mm | ~2.2 mm | Long eye relief maintained |
| How it’s calculated: With the TSN-EX16, magnification increases by 1.6× (e.g., 25–60× → 40–96×). Exit pupil ≈ Objective Ø (88 mm) ÷ Magnification. | |||||
| Compatible Accessories — TSN-88A / TSN-88S System [SOLD SEPERATELY] | ||
|---|---|---|
| Accessory | Purpose | Compatibility / Notes |
| TSN-EX16 1.6× Extender | Boosts magnification by 1.6× (e.g., 25–60× → 40–96×) | Fits between body & eyepiece; works with TE-11WZ II, TE-80XW, TE-20H |
| TSN-PA7A Digiscoping Adapter | Direct camera-body coupling (DSLR/Mirrorless) | Landscape/portrait; quick swap between viewing & shooting |
| TSN-DA10 Adapter | Versatile adapter for cameras/smartphones (with/without lens) | Also interfaces with Kowa smartphone adapters |
| Smartphone Adapters | Fixed, vignette-free smartphone digiscoping | Dedicated & universal options; works with TE-11WZ II / TE-80XW |
| TSN-95FT 95 mm Protection Filter | Protects objective; KR coating repels dirt/moisture | Fits native 95 mm filter thread; sunshade usable with filter attached |
| TSN-CV88A Eyepiece Protection Cap | Protects the eyepiece assembly when not in use | Part of the “Protection Kit” with TSN-95FT |
| Stay-On Case (Neoprene, Modular) | Rugged carry/protection in the field | Designed for TSN-88 form factor; quick access to controls |
| TSN-AS 1.25″ Astro Adapter | Accepts standard 1.25″ astronomical eyepieces | Expands use for astronomy with TSN-88 body |
| Aiming Sight (Detachable) | Faster subject acquisition | Fits accessory collar; additional built-in sight on lens hood |
| Note: All accessories use the TSN-88 accessory collar / bayonet system unless otherwise noted. Filter thread is 95 mm. Add EX16 to boost magnification by 1.6×. | ||

