Simmons Wilderness 10x42 Roof
The binoculars are equipped with BaK-4 glass prisms, and their lenses are covered by multilayer coatings. The instruments are also waterproof and nitrogen-filled.
| Magnification | Lens diameter | Angular field of view | Prisms | Eye relief | Weight | Price |
|---|---|---|---|---|---|---|
| 10 | 42 | 101/1000(5.8o) | BaK-4/roof | 13.8 mm | 680 g | 299 PLN |
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| Real front lens diameter |
Left: 41.89+/-
0.05 mm Right: 41.81+/- 0.05 mm |
7 / 8.0 pkt | ||||
|---|---|---|---|---|---|---|
| Real magnification | 9.82+/- 0.15x | 3/3.0 | ||||
| Transmission | 63+/- 3% | 3.5/25.0 | ||||
| Chromatic aberration | Medium. | 5.5/10.0 | ||||
| Astigmatism | Medium. | 5.8/10.0 | ||||
| Distortion | The distance of the first curved line from the field centre compared to the field of view radius: 29% +\- 3% | 2/10.0 | ||||
| Coma | Slight. | 7.2/10.0 | ||||
| Blurring at the edge of the FOV | The blur occurs in the distance of 84% +\- 3% from the field of view centre. | 6.5/10.0 | ||||
| Darkening at the edge the FOV | Slight but noticeable. | 3.6/5.0 | ||||
| Whiteness of the image | Very distinct yellow. | 1.8/5.0 | ||||
| Collimation | Perfect. | 5/5.0 | ||||
| Internal reflections |
|
3.9/5.0 | ||||
| Housing | Solid but it is difficult to set the inner tubes apart. Regulated eyecups but they pull out under pressure. Slippery rubber. | 6.5/8.0 | ||||
| Focusing | Comfortable central wheel. Comfortable ring on the right eyepiece but it moves the lens and is very tight. | 4.3/5.0 | ||||
| Tripod | Uncomfortable. | 2.5/3.0 | ||||
| Interpupilary distance | from 56 to 75mm | 5/6.0 | ||||
| Closest focusing distance | 4.2 m | 0.5/2.0 | ||||
| Eyepieces FOV | Apparent field of view of 54.7 deg (according to simple formula) and 51.1 deg (according to tangent formula). | 7/20.0 | ||||
| Field of view | Measured by us amounted to 5.57 +\- 0.03 degrees and was by 0.23 of a degree narrower than in the specifications. | 4/8.0 | ||||
| Quality of the interior of the barrels | Dark but shiny. Scratched bottom. Hairs and rubber splinters getting into the field of view. A hair on the right prism. | 2/5.0 | ||||
| Vignetting |
|
5.5/8.0 | ||||
| Prisms quality | Good BaK-4. | 8/8.0 | ||||
| Antireflection coatings | Navy blue coatings (1 layer most probably) on objective lenses and eyepieces. Not covered prisms. High intensity. | 3/5.0 | ||||
| Warranty [years] | 5 | 3.5/6.0 | ||||
| Final result |
56.1%
51st place in the overall ranking of our 10x42 binoculars’ test. |
106.6 / 190 pkt | ||||
| Econo result | 23rd place in the econo ranking of our 10x42 binoculars’ test. | 3.6pkt. |
Summary
Pros:
- handy casing,
- slight coma,
- quite sharp images,
- good quality BaK- 4 glass prisms.
Cons:
- low transmission,
- bad blackening and cleanliness inside inner tubes,
- high distortion,
- field of view narrower than declared in specifications,
- minimum focus from over 4 meters,
- yellow image,
- coatings of average quality and lack of coatings on the prisms.
Quite a nice surprise. The cheapest instrument in our test and the result still very decent, positioning this pair of binoculars as a strong rival of the Delta Optical Forest 10x42 which score was similar, but the price – higher and the field of view - distinctly narrower. However, paying about 100 USD for a roof prism device we must be aware of its flaws and their list is quite long.
