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Kowa
Kowa TSN-55 PROMINAR 17-40x55 angled spotting scope 55mm fluorite crystal 34.03 oz 10 in
Angled 55 mm fluorite spotting scope with 17-40x zoom, 192-105 ft field at 1000 yd, weighing 34.03 oz and measuring 10 inches
- Fluorite crystal lens delivers exceptional colour fidelity
- 17-40x zoom range brings distant subjects into sharp focus
- Wide 192-105 ft field of view at 1000 yd tracks moving targets easily
- Lightweight 34.03 oz body fits in a pack for travel
- Compact 10 inch length allows quick deployment in the field
Compact fluorite spotting scope
The Kowa TSN-55 PROMINAR is a 55 mm angled spotting scope built around a pure fluorite crystal objective lens. It provides a variable 17x to 40x magnification range in a body that measures 10 inches long and weighs 34.03 ounces. The design targets birdwatchers and nature observers who need high optical performance in a packable format.
Fluorite lens and zoom range
The fluorite crystal objective eliminates color aberration to deliver exceptional resolution and color fidelity across the zoom range. At 17x the field of view spans 192 feet at 1000 yards, narrowing to 105 feet at 40x for detailed inspection of distant subjects. This optical package replaces the need for separate low-power and high-power eyepieces.
Tripod and eye relief checks
Verify that your tripod head accepts the scope's mounting foot and can support the 34.03 ounce weight without vibration. Confirm the angled eyepiece orientation suits your viewing posture and that the eye relief at 40x accommodates any eyeglasses you wear. Ensure you have a protective case sized for a 10 inch optical tube.
Highlights
- Fluorite crystal lens delivers exceptional colour fidelity
- 17-40x zoom range brings distant subjects into sharp focus
- Wide 192-105 ft field of view at 1000 yd tracks moving targets easily
- Lightweight 34.03 oz body fits in a pack for travel
- Compact 10 inch length allows quick deployment in the field
Specifications
No published specifications for this item yet.
Questions about this item
Will the fluorite crystal objective lens need any special cleaning or replacement over time?
The 55 mm pure fluorite crystal objective lens is a sealed optical element; it does not require periodic replacement and only needs standard lens-care tools such as a blower, brush and optical cleaning fluid when dust or smudges appear.
At 40× magnification the field of view narrows to 105 ft at 1000 yd — is that the first limit I hit during long viewing sessions?
Yes, the 105 ft field at 1000 yd at 40× is the narrowest angle the zoom provides, so tracking fast-moving subjects becomes the practical constraint before optical quality degrades.
How much heat or noise does the scope produce when used continuously all day?
The TSN-55 PROMINAR is a passive optical instrument with no motor or electronics, so it generates no audible noise and no measurable heat during extended daytime use.
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