The Oberwerk Ultra ED 15x56 is a classic binocular featuring powerful Porro prisms and individual eyepiece focusing. Manufactured in China, it was introduced to the market in 2025. This model is primarily aimed at astronomical applications, as well as marine or military use, and is intended for stationary use on a tripod (a suitable tripod adapter is included in the box). It was the largest and heaviest binocular in our group test, with a measured weight of 1468 grams and dimensions of 204×217 mm at maximum interpupillary distance (IPD). The IPD range can be adjusted from 56.6 to 72.8 mm. The individual focusing system operates within a range of -5 to +5 diopters and yields a minimum focus distance of 15 meters, which perfectly matches the manufacturer's specification. Eye relief measures 18 mm.
The package includes a carrying case with its own strap, a neck strap, objective lens and eyepiece covers, a cleaning cloth, and a tripod adapter. The product is backed by a 5-year warranty. It was also the most affordable binocular in our test.
The Sky Rover Banner Cloud 15x56 APO features an image erecting system based on Schmidt-Pechan prisms. Also manufactured in China, it entered the market in November 2024. In contrast, it proved to be the lightest and most compact binocular we tested here. This is particularly interesting given that in the 32 mm and 42 mm classes, models from the Banner Cloud line are among the largest and heaviest on the market. In the 50–56 mm class, however, the situation is reversed: Sky Rover offers sleek and relatively lightweight models - a significant advantage. The measured weight of the Banner Cloud 15x56 APO is 1155 grams, with dimensions of 197×145 mm. The IPD adjustment range spans from 56.5 to 74.3 mm. The close focus distance is 4.8 meters, which is slightly shorter than the declared 5 meters. Eye relief also reaches 18 mm.
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The buyer receives a carrying case with its own strap, a neck strap, objective lens and eyepiece caps, and a lens cleaning cloth in the box. The product is backed by a 3-year warranty. It is the second most affordable binocular participating in our test. And speaking of the case, I couldn't resist taking the photo below. Let this be a way to have Leica present in this test, if only in spirit...
Manufactured in Austria, the Swarovski SLC 15x56 W B belongs to the third generation of this iconic series and entered the market in September 2013. It is designed around an Abbe-Koenig prism system, yet remains a fairly trim model. Only the Banner Cloud was lighter. The actual weight of the SLC 15x56 is 1208 grams, with dimensions of 191×152 mm. It is therefore shorter than the Sky Rover, but also wider. The interpupillary distance (IPD) can be adjusted from 55.8 to 76.1 mm, and the minimum focus distance is 3.9 meters, which perfectly matches the specifications. The eye relief, measuring 16 mm, is the shortest in this test.
The package includes a stylish carrying case, a neck strap, objective lens and eyepiece covers, and an optical cleaning kit. The product is backed by a 10-year warranty. The SLC 15x56 W B is the most expensive model in our test.
The Zeiss Conquest HDX 15x56 debuted on the market in August 2024 as the successor to the successful Conquest HD 15x56, featuring a slightly reduced weight, minor housing tweaks, and improved anti-reflective coatings. While the Conquest HD series bore a "Made in Germany" mark on the housing, production for the HDX has been moved to Japan.
This model also utilizes an Abbe-Koenig prism system. Consequently, the binocular is quite large, measuring 209×160 mm, with a true weight reaching 1268 grams. The IPD range adjusts from 55.2 to 76.0 mm, and focus can be achieved from as close as 2.6 meters - a truly impressive result, significantly shorter than the declared 3.5 meters. Eye relief measures 18 mm.
The package includes a stylish carrying case, a neck strap, objective lens and eyepiece covers, a dedicated tripod adapter, and an optical cleaning kit. The product is covered by a 10-year warranty.
Each of the subcategories mentioned above - weight, dimensions, interpupillary range, close focus distance, eye relief, included accessories, and warranty period - was scored individually and then summed up. As a result, the Zeiss Conquest HDX achieved the highest score, followed by the Sky Rover in second place, with the Swarovski SLC close behind. The Oberwerk trailed significantly behind the rest of the field.
