Monoculars
Two sealed 12x50 monoculars: which figures matter more?
Both are 12x50 monoculars with BAK-4 glass and full multi-coating, and both are sealed against water. They publish different things: the Bresser its weight and size, the K&F its field of view, how deep it is waterproof and how it mounts on a tripod.
| Compared on | Wave 12x50 (1331251) | KF33.075 12x50 |
|---|---|---|
| Aperture | 50 mm (1.97 in) | 50 mm (1.97 in) |
| Magnification | 12x | 12x |
| Exit pupil | 4.2 mm (0.17 in) | 4.2 mm (0.17 in) |
| True field of view | Not published by the maker. | 263 ft at 1000 yd (about 5°), stated |
| Prism | Roof prism, BAK-4 glass | BAK-4 |
| Sealing | Waterproof housing, nitrogen-filled | IP68, waterproof to 10 meters, dustproof |
| Weight | 435 g (15.3 oz) · 170 × 75 × 70 mm | Not published in the listing text |
| Listed on amazon.com | Yes | Yes |
A tick means one listing published something the other did not, or published a better figure. It does not mean the product is better, and the column is not a score out of anything: a maker who says less loses lines here without losing a comparison. The two verdicts below are where the page is settled.
The documented body. Bresser publishes the weight, 435 g, and the size, and adds a UR coating and a twist-up eyecup for glasses. It cost about $130 from a third-party seller on November 7, 2026.
The better buy on paper. A published field, an IP68 rating to 10 meters and a 1/4-inch tripod socket, at about $45. At 12x, that tripod socket is the feature that shows the Moon steadily.
The 4.2 mm exit pupil is fine at dusk and on the Moon. For stars and clusters, a 10x50 binocular delivers more light with both eyes.
Dust-tight and waterproof under continuous immersion; K&F states 10 meters. The Bresser is stated waterproof without a depth.
The K&F has a 1/4-inch socket. The Bresser listing does not mention one.
12x · 50 mm (1.97 in) · BAK-4 · UR and full multi-coating · waterproof, nitrogen-filled · 435 g (15.3 oz)
Bresser's Wave 12x50 roof-prism monocular: BAK-4 glass, UR and full multi-layer coatings, a twist-up eyecup for glasses, rubber armor and a waterproof nitrogen-filled body, published at 435 g.
Best for: A pocket instrument for dusk that is meant to be used in poor weather
≈ $130
12x · 50 mm (1.97 in) · 263 ft at 1000 yd · BAK-4 · FMC · IP68 to 10 m · 1/4 in tripod socket
K&F Concept's KF33.075 12x50 monocular: BAK-4 prism, fully multi-coated optics, a 263 ft field at 1000 yd, an IP68 body rated to 10 meters, an adjustable eyecup and a 1/4-inch tripod socket.
Best for: Wet-weather use where a sealed instrument is worth more than an extra millimeter of exit pupil
≈ $45
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.
