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15-45x55 Zoom Monocular 55mm BAK4 Prism 5.6° FOV
Variable 15-45x zoom with a 55 mm objective and BAK-4 prism delivers a 5.6° field of view in a waterproof, compact body
- Part15-45x55
- Specifications1x Monocular, 55, 15-45x, 45, 5.6 degrees, Manual Focus, Str
- Night VisionNo
- Field of View5.6 degrees
- Objective Lens55
- Total Magnification45
- Adjustable 15-45x zoom covers wide scenes and fine detail
- 55 mm objective lens gathers ample light for bright views
- BAK-4 prism delivers sharp, colour-true images edge to edge
- 6° field of view spans 294 ft at 1,000 yd
- Waterproof, non-slip body weighs 1.08 lb for easy carry
15-45x Zoom Monocular
The 15-45x55 zoom monocular provides variable magnification from 15x to 45x through a 55 mm objective lens. It uses a BAK-4 prism for high light transmission and edge-to-edge sharpness. The compact, waterproof body includes a non-slip grip and a twist-up eyecup for use with or without glasses. It suits adults who want a single optic for bird watching, travel, concerts and outdoor sports.
5.6° Field of View and Fixed Optics
The 5.6 degree field of view delivers a wide scene of 294 feet at 1000 yards, which is set by the optical design and cannot be changed. There is no night-vision capability, so low-light performance depends entirely on the 55 mm aperture and prism quality. Manual focus and a straight-through body mean the user must adjust the eyepiece for each distance, and the zoom range is limited to the stated 15-45x.
55 mm Objective Lens Decides Light Grasp
The 55 mm objective diameter is the single specification that determines how much light the monocular gathers and therefore how bright the image appears at high magnification. Buyers who need a brighter exit pupil for dawn or dusk observation, or who require a wider maximum field than 5.6 degrees, should look for a larger objective. This model is not for users who need built-in image stabilisation or electronic night vision.
Highlights
- Adjustable 15-45x zoom covers wide scenes and fine detail
- 55 mm objective lens gathers ample light for bright views
- BAK-4 prism delivers sharp, colour-true images edge to edge
- 6° field of view spans 294 ft at 1,000 yd
- Waterproof, non-slip body weighs 1.08 lb for easy carry
Specifications
| Part Number | 15-45x55 |
|---|---|
| Part | 15-45x55 |
| Specifications | 1x Monocular, 55, 15-45x, 45, 5.6 degrees, Manual Focus, Straight-Through, 15-45x Zoom, BAK-4 Prism, Compact, Waterproof, Non-slip Grip, Sogries |
| Night Vision | No |
| Field of View | 5.6 degrees |
| Objective Lens | 55 |
| Total Magnification | 45 |
| Features | 15-45x Zoom, BAK-4 Prism, Compact, Waterproof, Non-slip Grip |
| Size/Dimensions | 8.27 in x 3.35 in x 2.76 in |
Questions about this item
Which magnification range should I choose for bird watching?
The monocular zooms continuously from 15x to 45x, so you can scan wide at low power and zoom in for detail without swapping optics.
What does the 5.6° field of view give me at distance?
At 1000 yards the view spans 294 feet, letting you follow moving subjects like birds or athletes without losing them at the edges.
How does the BAK-4 prism affect image quality in practice?
The BAK-4 prism transmits more light to the eye than standard prisms, producing brighter, sharper images with less colour fringing, especially in low light.
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