Brand
A daytime monocular with its figures published
Gosky makes daytime optics, monoculars and spotting scopes, sold with phone adapters. On this site it has one product: the Piper 12x55.
Twelve times on a 55 mm objective, an 18 mm BAK4 prism, fully multi-coated optics, a 352 ft field at 1000 yd, a 4.58 mm exit pupil, and an IPX7 nitrogen-filled body. A tripod and a smartphone adapter are in the box. On November 7, 2026, Amazon sold it directly at $89.48.
A 12x monocular is a daytime instrument first. On the included tripod it shows the Moon well; for stars and clusters, a 10x50 binocular does more.
Earlier versions of the listing gave a 20 mm prism; the current one says 18 mm. This site follows the current listing.
The Piper has the largest objective and exit pupil among the handheld monoculars here. The comparison with the K&F Concept 12x50, which publishes a deeper IP68 rating, shows the trade between brightness and sealing.
12x · 55 mm (2.17 in) · 352 ft at 1000 yd · 4.58 mm exit pupil · 18 mm BAK4 · IPX7 · tripod and phone adapter
Gosky's Piper 12x55: an 18 mm BAK4-prism monocular with fully multi-coated optics, a 352 ft field at 1000 yd, a 4.58 mm exit pupil, an IPX7 nitrogen-filled body, a tripod and a smartphone adapter.
Best for: Birdwatching and dusk viewing where the extra objective earns its weight
≈ $89
Any figure written into the body of this page was true on the day it was written. The amount shown next to each instrument is requested from the retailer as the page loads, and it is that amount, not the text, that stands.
