Two eyes, a wide field, and no setup at all · review
Nikon's Action 10x50: a rubber-armored porro binocular with multilayer-coated lenses, turn-and-slide eyecups, long eye relief for glasses and a tripod-ready body.
Ten times magnification, fifty millimeters of objective. Divide one by the other and the exit pupil is 5 mm, which suits an eye adapted to the dark. Those two numbers decide most of what a binocular does on the sky.
Multilayer-coated lenses, porro prisms, rubber armoring, turn-and-slide eyecups with click stops, and a long eye relief design for eyeglass wearers. The title adds that the body is tripod-ready.
Field of view, close focus and weight. Amazon’s item data gives 936 g (33 oz), at the heavy end for a 10x50. There is no waterproofing claim; that is the Action EX, a different model.
At 10x a heartbeat is visible in the view. That is arithmetic, not a fault. Experienced observers brace against a wall, sit in a reclining chair, or put the binocular on a tripod with an L-adapter. The difference in what becomes visible is larger than any difference between two pairs of this class, and the Action is built for that adapter.
Open clusters, the brighter nebulae, comets, the Milky Way in summer and the Moon at low power. It is the instrument that gets used on the nights when the telescope stays indoors. If you are deciding between this and the Pentax Jupiter, see Nikon Action 10x50 vs Pentax Jupiter 10x50.
On November 7, 2026, Amazon.com sold it directly at $129.95.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on November 7, 2026. The live price is at the top of the page.
Same aisle, closest price — what the same spend else shows.
| Aperture | 50 mm (1.97 in) objectives |
|---|---|
| Magnification | 10x |
| Exit pupil | 5 mm (0.20 in), the quotient of the two published figures |
| True field of view | Not published in the listing. |
| Prism type and coatings | Porro prisms · multilayer-coated lenses |
| Eye relief | Not published as a figure · long eye relief design, stated to give a clear field for eyeglass wearers · turn-and-slide rubber eyecups with multi-click stops |
| Close focus | Not published in the listing. |
| Weight | Not published in the listing text · Amazon's item data gives 936 g (33 oz) |
| Tripod mounting | Tripod-ready, stated in the title (an adapter is needed) |
| Supplied accessories | Not published in the listing. |
| Amazon reference | B0GMRVGP9P |
| EAN | 0018208168088 |
At 10x a heartbeat is visible in the view. Fixed on a tripod, the same binocular shows fainter stars and finer detail, because the eye can rest on the image instead of chasing it. The Action is sold tripod-ready; the L-shaped adapter is a separate purchase.
No. The EX is Nikon's waterproof, nitrogen-filled version. This listing is the Action 10x50 and makes no waterproofing claim.
Nikon states a long eye relief design for eyeglass wearers, with turn-and-slide eyecups that click into several positions. The figure in millimeters is not in the listing.
7.8/ 10
A long-established 10x50 with the right exit pupil, long eye relief and a tripod-ready body, sold on a listing that leaves out its field and weight.
This model is listed on Amazon.com, at ≈ $130 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on November 7, 2026.
Sweeping the Milky Way and open clusters, on a tripod or from a reclining chair
Specifications: the manufacturer sheet for telescopes and observing optics and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
10x · 50 mm (1.97 in) · BK-7 porro prisms · fully coated · InstaFocus
A long-running 10x50 porro binocular from Bushnell's Falcon line, with BK-7 prisms, fully coated optics and a central InstaFocus lever, and no waterproofing claimed.
Best for: A first, inexpensive pair kept in the car for whatever the sky or the day offers
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10x · 50 mm (1.97 in) · 282 ft field at 1000 yd · BaK-4, silvered prisms · 26.1 oz (740 g)
A waterproof, nitrogen-filled 10x50 with BaK-4 prisms carrying an extra silver coating, published with its field of view, close focus, dimensions and weight.
Best for: The observer who wants to compare figures rather than adjectives before buying
≈ $226
10x · 50 mm (1.97 in) · BaK-4 prisms · waterproof, gas-filled · 758 g (26.7 oz)
A waterproof, gas-filled 10x50 porro binocular with BaK-4 prisms, full multi-coating, a UR prism coating, twist-up eyecups and a metal center focus, published with its weight and size.
Best for: Dusk and night-sky use in damp or cold weather that would fog an unsealed pair
≈ $166
