Eschenbach trophy AS/P 10x50 B Ww
The AS/P and AS/D series feature solid aluminum casing padded with high quality rubber. The binoculars are waterproof and nitrogen-filled; they also come with a 10-year guarantee period. The prisms are made of BaK-4 glass and all air-to-glass surfaces are covered by antireflection multilayer coatings which are supposed to ensure high efficiency and damp down inner flares as well.
| Magnification | Lens diameter | Angular field of view | Prisms | Eye relief | Weight | Price |
|---|---|---|---|---|---|---|
| 10 | 50 | 114/1000(6.5o) | BaK-4/Porro | 18 mm | 1150 g | 1099 PLN |
| Real front lens diameter |
Left: 50.01+/-
0.05 mm Right: 50.03+/- 0.05 mm |
8 / 8.0 pkt | ||||
|---|---|---|---|---|---|---|
| Real magnification | 9.9+/- 0.2x | 3/3.0 | ||||
| Transmission | 90+/- 3% | 17.5/25.0 | ||||
| Chromatic aberration | Slight in the middle, a bit higher on the edge. | 6.2/10.0 | ||||
| Astigmatism | Medium. | 6.2/10.0 | ||||
| Distortion | The distance between the first curved line and the field centre compared to the field of view radius: 44% +\- 4% | 4.5/10.0 | ||||
| Coma | Appears quite quickly and is distinct. | 6/10.0 | ||||
| Blurring at the edge of the FOV | The blur occurs in the distance of 74% +\- 4% from the field of view centre. | 4/10.0 | ||||
| Darkening at the edge the FOV | Low. | 4/5.0 | ||||
| Whiteness of the image | Minimum yellow. | 4.5/5.0 | ||||
| Collimation | Perfect. | 5/5.0 | ||||
| Internal reflections |
|
1.5/5.0 | ||||
| Housing | Good quality. Comfortable and solid. Nitrogen-filled and waterproof. No reservations. | 7.3/8.0 | ||||
| Focusing | Central and classic. It is comfortable and moves smoothly. Eyepieces move minimally sideways. Defocus only under a very high pressure. | 4/5.0 | ||||
| Tripod | There is a comfortable exit. | 3/3.0 | ||||
| Interpupilary distance | from 59.2 to 72.1mm | 2/6.0 | ||||
| Closest focusing distance | 4.80-m. | 2/2.0 | ||||
| Eyepieces FOV | Apparent field of view of 62.3 deg (according to simple formula) and 57.1 deg (according to tangent formula). | 12.5/20.0 | ||||
| Field of view | Measured by us amounted to 6.29 +\- 0.04 degrees and it was by 0.21 degrees narrower than in the specifications. | 5/8.0 | ||||
| Quality of the interior of the barrels | Inner tubes gray and matt. Bottom very light. Visible white glue. Clean. | 2.9/5.0 | ||||
| Vignetting |
|
1.5/8.0 | ||||
| Prisms quality | Good BaK-4. | 8/8.0 | ||||
| Antireflection coatings | High quality greenish MC on all air-to-glass surfaces. Medium intensity. | 4.5/5.0 | ||||
| Warranty [years] | 10 | 4/6.0 | ||||
| Final result | 66.9% | 127.1 / 190 pkt | ||||
| Econo result | No econo rank. | 0pkt. |
Summary
Pros:
- good transmission,
- chromatic aberration, coma and distortion corrected well,
- very good whiteness rendition,
- very solid casing,
- good quality or prisms and anti-reflection layers,
- low brightness loss on the edge of the field,
- 10 years’ guarantee
Cons:
- visible reflections,
- truncated exit pupils,
- significant weight,
- too narrow IPD,
Another well-put-together product of Eschenbach, reaching a result which let it keep level with such binoculars as the Bresser Montana 10x50 or the Carl Zeiss Jena Dekarem/Jenoptem 10x50. The tested pair of binoculars can be praised for high transmission, good correction of such aberrations as chromatic aberration, coma or astigmatism, very good whiteness rendition and a solid casing. You can criticize this instrument for truncated pupils, visible reflections or too narrow gauge of eyepieces. However, all of these become a bit less important if you compare this pair of binoculars to the Minolta Activa 10x50 or the Nikon Action EX 10x50. These three instruments are on par when it comes to the price but, unfortunately, in no testing category the Eschenbach trophy AS/P 10x50 B Ww managed to conquer the Minolta or the Nikon; in several categories it was a bit worse and, in addition, it weighs significantly more… On the other hand, though, if you trust German solidity more than Japanese diligence the Eshcenbach with its 10-year guarantee and the casing which looks simply indestructible, seems to be very tempting option.
