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Kowa 554 Prominar 15-45x55 Fluorite Cyrstal Straight Spotting Scope (TSN-550 series)

SKU: KWA-554

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A truly unique compact spotting scope featuring a fluorite crystal objective lens, designed to make your journeys truly memorable and immersive. 

  • 55mm fluorite crystal objective lens eliminates chromatic abberations and produces bright and clear high-contrast images

  • 15 - 45x zoom eyepiece produces accurate colour rendition for an immersive and detailed observational experience 

  • Smallest spotting scope in the Kowa Prominar series 

  • O-ring sealed and nitrogen purged for perfect performance in the field

  • Lightweight and strong polycarbonate material wrapped in a slip-resistant armour, with a rubberised and textured zoom collar and focus wheel for easy operation

Dispatch in 4-6 Days

Regular Price: $2,899.00

Special Price $2,599.00

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Kowa enjoys a spectacular reputation of enduring quality internationally - a journey of over 60 years of heritage, refining and perfecting techniques passed down from decade to decate from the Kowa optical masters in Japan. This legacy leads to the the compact and heralded Kowa TSN-554 Prominar Series spotting scope! 

This version of the Kowa's TSN-550 is configured with the eyepiece set in-line with the optical tube for straight-through viewing to make acquiring targets fast and tracking moving subjects easy! The TSN-554 is one compact scope you should have in your hands during your scoping adventures.


Prominar | The Pinnacle of Optical Excellence

The TSN-554 is one of the few optics worthy of the Prominar title; The Prominar label is reserved only for Kowa's finest - those using its unique fluorite crystal to deliver the best optical performance.

Incredible Clarity | Ultimate Viewing Experience:

At the heart of the TSN-554 Prominar series scope beats a fluorite crystal objective lens. This natural mineral has an outstanding feature of very low dispersion that cannot be replicated in optical glass, and eliminates colour blur almost completely and dramatically increase resolution and contrast. 

Fluorite crystal is a unique feature of Kowa spotting scopes, and is considerably more difficult to handle than optical glass - requiring highly advanced processing technology. The Prominar spotting scope series stands as a testament to decades of Kowa optical developments.

Perfection In Your Palm:

Measuring about 290mm in length and 800g in weight, the TSN-554 is ultra-portable and makes the perfect travel companion in your hand. 

The Legacy Continues | Fits Your Way of Life:

The TSN-554 is more than just an optic; It represents a way of thinking, a way of life. The TSN-550 series adopts the unique styling of its larger predecessor (TSN-880) and has years of optical development experience etched into its design.

It is a unique optic that enhances every moment you use it, creating opportunities wherever your journey takes you. 

Reliability Guaranteed: 

A lightweight yet durable, fully waterproof and nitrogen-purged chassis ensures performance even in the toughest environments.


Spotting Scope Info: 


  • Angled Viewing
  • Porro Prism optical path design


15 - 45x

Objective Lens Diameter

55mm (2.2")

Field of View at 1000m

43.9 - 23m 

Eye Relief

16.5 - 16mm 

Exit Pupil

3.7 - 1.2mm

Minimum Focus Distance

3m (9.8")


Accepts 58mm (2.3") filters (user-provided) 

Lens Type

Fluorite Crystal

Lens Coatings

Fully Multicoated


  • 287 x 86 x 66 mm (11.3 x 3.4 x 2.6")
  • Weight: 800g
  • Housing: Lightweight and impact-resistant polycarbonate construction

Environmental Protection

Waterproof (Japanese Industrial Standard protection class 7)

Nitrogen Filled

Yes (O-ring sealed)

Extra Specifications

  • Integrated aiming sight
  • Smooth and precise two-speed (coarse and fine) focusing mechanism moves through the entire focus range in two turns
  • Rubberised and textured zoom collar and dual-speed focusing wheel
  • Twist-up eyecup for comfortable use with or without eyewear
  • Oil-resistant KR exterior lens coatings makes it easy for dirt, sap and oil to be cleaned off without smudges/residue
  • Retractable sunshade reduces glare and lens flare while keeping snow and rain off the objective for clearer viewing
  • Equipped with both 1/4"-20 and 3/8"-16 tripod threads (accommodates most photo, video and field tripods)

Additional Information

Additional Information

Optical Design N/A
Mount Type No
Aperture 55mm
Focal Ratio Not provided by Kowa
Eyepiece 1 No
Eyepiece 2 No
Eyepiece 3 N/A
Finderscope Make No
Electronic Hand Control No
Motor Drive No
Go-To Functionality N/A
Focal Length No
Tripod N/A
Tube Length 287 (11.3")
Highest Magnification 45x
Warranty Information 10 Years Warranty
Additional Specifications of Product No
Shipping Dimensions N/A
Shipping Weight N/A