Binoculars review

Vixen New Foresta 10x50 DCF

Vixen New Foresta 10x50 DCF
11 March 2015
In October 2009 Vixen announced the launch of a new series of binoculars called New Foresta, including the following models: the 8x32, the 8x42 and the 10x42. In March 2010, during the IWA fairs, they added two more devices, the 10x50 and the 8x56.

As the name indicates the new series is supposed to supersede the old Foresta. It is a serious change – the old Foresta were classic Porro binoculars. It seems Vixed, launching a new series consisting of only roof prism instruments, is following a trend very popular lately. Fortunately the new models’ parameters remained intact – their fields of view are supposed to be similar to those of the earlier models.

All New Foresta binoculars are waterproof and nitrogen-filled; all air-to-glass surfaces are covered by high quality anti-reflection coatings. The roof prisms made of BaK-4 are faze-correction coated and additionally covered by reflection enhanced coating. Every New Foresta pair of binoculars comes with 5 years of warranty period.

  • Lornetka Vixen New Foresta 10x50 DCF
  • Lornetka Vixen New Foresta 10x50 DCF
  • Lornetka Vixen New Foresta 10x50 DCF
  • Lornetka Vixen New Foresta 10x50 DCF
Manufacturer data


web site

Distribution / Sales:

web site

Magnification Lens diameter Angular field of view Prisms Eye relief Weight Price
10 50 93/1000(5.3o) BaK-4/roof 18 mm 760 g 1099 PLN
Results of the review
Real front lens diameter Left:   49.45+/- 0.05 mm
Right:  49.38+/- 0.05 mm
5 / 8.0 pkt
Real magnification 9.83+/- 0.05x 3/3.0
Transmission 84.05+/- 1.5% 12/25.0
Chromatic aberration Medium in the centre, a bit higher than average on the edge. 3.2/10.0
Astigmatism Slight. 7/10.0
Distortion The distance between the first curved line and the field centre compared to the field of view radius: 65% ± 4% 7.5/10.0
Coma Appears in a distance of 65% of field of view radius and is high on the very edge. 5/10.0
Blurring at the edge of the FOV The blur occurs in a distance of 84% +\- 3% from the field of view centre. 6.5/10.0
Darkening at the edge the FOV Moderate. 3.7/5.0
Whiteness of the image Good. 3.8/5.0
Collimation Perfect. 5/5.0
Internal reflections
Left: Right:
Vixen New Foresta 10x50 DCF - Internal reflections - Left Vixen New Foresta 10x50 DCF - Internal reflections - Right
Housing Medium-sized "open hinge" design. Smooth, slippery rubber armour. Rubberized eyecups with 4 positions. Rubber sticks out a bit near the objectives. Made in China. 7.5/8.0
Focusing Very big, comfortable, ribbed central wheel which moves smoothly and is well-damped (full turn through 440 degrees). Individual focusing through click-stop on the central wheel. Nothing moves outside. 5/5.0
Tripod There is an exit but far from the mass centre. 2.5/3.0
Interpupilary distance from 59.1 to 77.9mm 4/6.0
Closest focusing distance 3.3 meters. 2/2.0
Eyepieces FOV Apparent field of view of 57.3 deg (according to simple formula) and 53.2 deg (according to tangent formula). 9/20.0
Field of view Measured by us amounted to 5.83 +\- 0.03 degrees and was noticeably higher than the data provided by the producer. A quite good field of view for this class of equipment. 6/8.0
Quality of the interior of the barrels Perfectly darkened, matted and baffled tubes. A small, gray bottom. Screws painted dark-gray. Some microscopic specks of dust. 4.5/5.0
Left: Right:
Vixen New Foresta 10x50 DCF - Vignetting - Left Vixen New Foresta 10x50 DCF - Vignetting - Right
OL: 0.9%, OR: 2.1%.
Prisms quality Good quality BaK-4. 8/8.0
Antireflection coatings Greenish everywhere. Medium intensity. 4.5/5.0
Warranty [years] 5 3.5/6.0
Final result
128.2 / 190 pkt
Econo result 0pkt.


  • shapely and lightweight casing for the 10x50 class device,
  • sensible transmission,
  • slight astigmatism,
  • properly corrected distortion,
  • good quality prisms made of BaK-4,
  • proper darkening and cleanliness inside the tubes,
  • sharp image in the majority of the field of view,
  • dark area near exit pupils,
  • good quality coatings.

  • a bit too high chromatic aberration,
  • slightly truncated exit pupils.

We don’t doubt that the New Foresta series produced by the Japanese company Vixen is quite well done. In our tests we managed to take a closer look at the 8x32 and 8x42 models and both performed very well also featuring a very good price/quality ratio. As 10x50 parameters belong to the most popular ones we decided to check also the Vixen New Foresta 10x50.

The fact that the producer treats the parameters stated in the specifications and on the casing in a rather cavalier manner sticks out at once. Let’s remind that the New Foresta’s 8x32 field of view was noticeably higher in the specifications than in reality; here the situation is reversed. The producer declares a field of view of 5.3 degrees so not especially impressive for 10 times magnification. Fortunately the real field of view amounts to 5.83 degrees which is a very good value. For a change the diameter of objective lenses is a bit smaller than the declared 50 mm.

The weight and parameters of the tested lens deserve our praise. The following chart shows clearly that you deal here with one of the lightest binoculars in this class of equipment. Additionally in the photo below you see it is also quite handy.

Delta Optical Forest II 10x50, Nikon Prostaff 5 10x50 and Vixen New Foresta 10x50.

The 8x32 and 8x42 models had very good transmission levels for cheap roof prism instruments. Let’s check how the 10x50 model compares here.

The situation is definitely better than in the case of the Delta Optical Forest II 10X50 and the Nikon Prostaff 5 10x50. In the red part of the spectrum the transmission reaches a very high level of 90% and in the centre of the visible spectrum it exceeds distinctly 80%. These are very sensible results at this price point. Of course we would like to see a flatter graph but, as we are already getting quite a lot there is no reason to complain.

It is very important that the binoculars not only had many good results in different categories (such as the astigmatism correction, distortion correction, flares or blackening) but also didn’t have any serious slip-ups. Of course we wish its chromatic aberration level was lower and the exit pupils less truncated but you have to remember you deal here with a shapely roof prism instrument costing only about 1000 PLN. There are no miracles and there had to be some compromises reached. Our final assessment of the tested binoculars is very positive indeed. It should be emphasized that the result of the new Vixen is comparable with the results of solid Porro instruments (like e.g. the Pentax PCF 10x50 WP, the Nikon Tundra 10X50 CF WP or the Leupold Mesa 10x50). If a roof prism device, costing the same amount of money as a Porro pair of binoculars, additionally achieves the same level of performance we don’t doubt it is a highly recommendable instrument.