Kowa Prominar TSN883 Angled 88mm Spotting Scope With 25-60x Eyepiece
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Kowa Prominar TSN883 Angled 88mm Spotting Scope With 25-60x Eyepiece
Experience world-class viewing with the TSN-883 Angled 88mm PROMINAR spotting scope. Built around an 88mm pure fluorite crystal objective, this scope delivers color brilliance, exceptional sharpness, and remarkable brightness—reducing chromatic aberration to reveal every feather, ripple, and nuance in the scene. Paired with Kowa’s advanced C3 prism multi-coating, it pushes light transmission higher than prior generations, producing a bright, natural image at even the highest magnifications.
 Waterproof Nitrogen Filled |  Magnesium Alloy Robust |
 Low Light Dawn / Dusk |  Large Objective 88mm Diameter |
 Fluorite Crystal | |
Why the TSN883 stands apart
The 88mm fluorite crystal objective is the optical powerhouse at the heart of PROMINAR engineering. Fluorite crystal dramatically minimizes chromatic aberration, delivering true-to-life color and razor-sharp detail across magnifications. When paired with Kowa’s patented C3 prism coatings, you gain brighter images with higher light transmission, translating to more “seeing” in low-light moments and richer contrast in busy backgrounds. The magnesium alloy housing provides a rare combination of durability and lightness, yielding a compact, ergonomic design that’s built to endure rugged outdoor use without weighing you down during long glassing sessions. The angled viewing setup enhances group viewing and sharing, while maintaining comfortable posture for extended sessions in the field.
Key features include:
- 88mm pure fluorite crystal objective for exceptional color fidelity and minimal chromatic aberration.
- C3 prism multi-coating for increased brightness and higher light transmission.
- Magnesium alloy body engineered for rugged durability with lightweight handling.
- Angled design ideal for group viewing and longer glassing sessions.
- Waterproof construction with nitrogen filling to protect against the elements.
- Low-light performance suited to dawn and dusk observation.
- Natural color rendition—the view is color-true, letting you explore every subject in its real-life hues.
- Includes a 25-60x eyepiece for flexible magnification across a wide range of viewing scenarios.
- Dual Focus system for precise, fast focusing in dynamic field conditions.
Designed for real-world use and results
Whether you’re tracking a flock in the early morning light or scanning a distant shoreline for elusive wildlife, the TSN883 Angled offers a balanced blend of brightness, detail, and ergonomic usability. The angled design makes it easier to share the view with others and reduces neck strain during prolonged sessions, while the large 88mm objective ensures you’re not sacrificing brightness as you zoom in. The combination of fluorite optics and advanced coatings means you’ll get a cleaner image with less color fringing, allowing you to identify subtle field marks that matter for birding, wildlife observation, and nature study.
Technical overview at a glance
- Objective: 88mm fluorite crystal
- Prism: C3 multi-coated
- Eyepiece: 25-60x (included)
- Body: Magnesium alloy
- Viewing angle: Angled
- Waterproof and nitrogen-filled
- Low-light performance: Enhanced for dawn/dusk
- Focus: Dual Focus for precision
- Color: Natural, true-to-life rendering
For enthusiasts who demand the most faithful representation of their subject and the flexibility to share the moment with others, the TSN883 Angled 88mm PROMINAR spotting scope sets a new standard in optical performance and field-ready design.
| Waterproof Nitrogen Filled | Magnesium Alloy Robust |
| Low Light Dawn / Dusk | Large Objective Super Bright |
| Fluorite Crystal Ultimate Quality |  Dual Focus Total Precision |
| 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×. | ||