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Kowa TSN-554 55mm Prominar Pure Fluorite Spotting Scope, Straight

by Kowa
Original price $1,799.00 - Original price $1,799.00
Original price
$1,799.00 - $1,799.00
Current price $1,799.00

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Utilizing Kowa's PROMINAR Fluorite Crystals lenses, the new compact Kowa TSN-550 PROMINAR is truly a unique spotting scope, designed to make your journeys truly memorable and immersive. This PROMINAR 55mm series sets a new benchmark standard in the compact spotting scope market

A journey of over 60 years of heritage, refining and developing techniques passed down decade to decade from the Kowa optical masters in Japan. This legacy leads us to where we are now – introducing the new compact Kowa TSN-550 PROMINAR – a truly unique spotting scope, designed to make your journeys truly memorable and immersive.

Not only does the TSN-550 PROMINAR adopt the unique styling of it’s larger predecessor, it also inherits what makes the TSN-880 still unrivalled to this day – decades of Kowa optical development. The result? A new benchmark optic in the compact spotting scope market.

Only the finest optics deserve the accolade of the PROMINAR title. Optics that utilise Kowa’s unique benchmark feature – fluorite crystal, delivering simply the best optical performance available today.

Fluorite Crystal Lenses
Fluorite crystal makes for the ideal lens material with "ultra-low dispersion" properties not possessed by an ordinary optical glass. This outstanding specification adds the featured benefit of a near-completely reduced chromatic aberration, or color blur, to provide users with the ultimate viewing experience.

Kowa's KR Coating
Kowa's KR coating protects the lenses from dirt and other foreign residues that may affix to the lenses during normal use. Fingerprints or oil can easily be removed with the proper lens cleaning techniques.

Waterproof and Fogproof
The housing is waterproof to JIS Protection Class 7 and filled with dry nitrogen gas to prevent internal fogging to ensure image clarity.

Dual Focus Mechanism
Kowa's well-developed focus system has progressed to a dual focus system with smooth movement at high magnifications for pinpoint accuracy in image display. The quick focus can easily shift from infinity to 5m in two revolutions with the large and manoeuvrable knob. The fine focus moves fluidly to create pinpoint accuracy and is extremely useful at high magnifications and with digiscoping systems.

Tripod Mounting Screw
A tripod mounting screw allows the scope to be safely secured to both 1/4 and 3/8 inch mount tripods.

Twist-Up Eyecup
Twist-up multi-step eyecup allow customization for easy viewing even when wearing eyeglasses.

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

At the heart of the TSN-550 PROMINAR series spotting scope beats a fluorite crystal objective lens. This natural mineral has an outstanding feature of very low dispersion that cannot be found in optical glass. This characteristic enables Kowa to eliminate colour blur almost completely and dramatically increase resolution and contrast. Fluorite crystal is a unique feature of Kowa spotting scopes and is a testament to decades of Kowa optical developments. Measuring just a mere 270mm in length and weighing only 800g, the TSN-550 PROMINAR is truly compact and makes the perfect travel companion.

The TSN-550 PROMINAR represents a way of thinking, a way of life. An optic that enhances every moment you use it. It’s unique. A spotting scope this compact creates new opportunities. Wherever your journey takes you, the Kowa TSN-550 is the perfect travel companion. A lightweight yet durable, fully waterproof and nitrogen filled chassis ensures performance in the toughest of environments.

Objective Lens Effective Diameter: 55mm
Objective Lens Material: Fluorite Crystal
Minimum Focusing Distance: 3.0m
Length: 271mm
Weight: 810g
Filter thread: 58mm
Waterproof IPX6 (Dry Nitrogen Gas)
Material for Body Polycarbonate
Color 880 Green
Magnification 15-45x
Minimum Focusing Distance 9.8ft
Exit Pupil 2.5mm~1.3mm
Eye Relief 14~12.5mm
Field of view (at 1000ft) 132ft - 69ft
Eyepiece Non-changeable
Twist-up eye cap Yes


Key Advantages
  • Fluorite crystal objective lens
  • Virtually zero chromatic aberration
  • Fixed 15-45x zoom eyepiece
  • Ultra compact body
  • Lightweight
Scope of Supply
  • TSN-554 15-45x straight spotting scope 
  • Objective lens cap
  • Eyepiece cap
  • Instruction manual
  • Cleaning cloth

Kowa TSN-550 Brochure

Kowa TSN-550 Data Sheet

Kowa Spotting Scopes and Accessories Brochure