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Binoculars review

Bynolyt Buzzard SHR 10x42 DCF

Bynolyt Buzzard SHR 10x42 DCF
7 July 2010
Optyczne.pl 
The Buzzard SHR series consists of exceptionally light, compact and handy roof prism binoculars with the following parameters: 8x28, 8x32, 8x42 and 10x42. All these instruments were made of BaK-4 glass prisms, phase correction coated. The producer ensures that in order to get the best transmission and damp down unwanted flares all air-to-glass surfaces were covered by high quality antireflection multilayer coatings. Additionally, as the Schmidt-Pechan system prisms need to use one reflective surface, it was coated not by ordinary aluminum, reflecting only less than 92% of light, but by special 60-layer dielectric SHR coatings – they are supposed to minimize the light losses to about 1%. Owing to that fact the producer guarantees that the overall transmission in the binoculars will reach over 90%.

The housing is made of light but solid aluminum padded with high quality rubber. The binoculars are waterproof and nitrogen-filled. The Buzzard series comes with a 25-year-long guarantee.

Pictures
  • Lornetka Bynolyt Buzzard SHR 10x42 DCF
  • Lornetka Bynolyt Buzzard SHR 10x42 DCF
  • Lornetka Bynolyt Buzzard SHR 10x42 DCF
  • Lornetka Bynolyt Buzzard SHR 10x42 DCF
Manufacturer data

Manufacturer:

Bynolyt
web site

Distribution / Sales:

Migomex
web site

Magnification Lens diameter Angular field of view Prisms Eye relief Weight Price
10 42 105/1000(6o) BaK-4/roof 16 mm 760 g 1669 PLN
Results of the review
Real front lens diameter Left:   42.03+/- 0.05 mm
Right:  42.03+/- 0.05 mm
8 / 8.0 pkt
Real magnification 9.98+/- 0.15x 3/3.0
Transmission 92+/- 3% 13.5/15.0
Chromatic aberration Medium in the centre, high at the edge. 4.5/10.0
Astigmatism Medium. 5.2/10.0
Distortion The distance of the first curved line from the field centre compared to the field of view radius: 41% +\- 6% 4/10.0
Coma Slight. 6.7/10.0
Blurring at the edge of the FOV The blur occurs in the distance of 78% +\- 3% from the field of view centre. 5/10.0
Darkening at the edge the FOV Visible. 2.9/5.0
Whiteness of the image Minimal cream. 4.5/5.0
Collimation Perfect. 5/5.0
Internal reflections
Left: Right:
Bynolyt Buzzard SHR 10x42 DCF - Internal reflections - Left Bynolyt Buzzard SHR 10x42 DCF - Internal reflections - Right
Low.
4.4/5.0
Housing Small and handy, comfortable against the face. Padded with slippery rubber. The eyecups with only two stops and a bit loose. 6.2/8.0
Focusing Comfortable central screw. Running through the whole focus scale needs a 450-degree turn. Focusing ring on the right tube was put into the eyecup – it moves smoothly and correctly but it is not a good solution from the ergonomics’ point of view. The outer lens moves by focusing. 4.2/5.0
Tripod There is a moderately difficult access to the exit. 2.5/3.0
Interpupilary distance from 58 to 74mm 5/6.0
Closest focusing distance 1.80 m. 2/2.0
Eyepieces FOV Apparent field of view of 60.3 degrees. 7/10.0
Field of view Measured by us amounted to 6.03 +\- 0.04 degrees and it was by 0.04 degress wider than in the specifications. 5/8.0
Quality of the interior of the barrels Dark but not entirely matt. Clean. 4.4/5.0
Vignetting
Left: Right:
Bynolyt Buzzard SHR 10x42 DCF - Vignetting - Left Bynolyt Buzzard SHR 10x42 DCF - Vignetting - Right
Egg-shaped pupils.
OL: 5.6%, OR: 3.5%.
2/8.0
Prisms quality Good BaK-4. 8/8.0
Antireflection coatings Yellow-purple on the objectives. Yellow on the prisms. Greenish-purple on the eyepieces. Low intensity. 5/5.0
Warranty [years] 25 years 5/6.0
Final result
72.4%
33rd place in the overall ranking of the 10x42 binoculars test.
123 / 170 pkt
Econo result 30th place in the overall ranking of the 10x42 binoculars test. -0.1pkt.

Summary


Pros:
  • handy and solid housing,
  • slight coma,
  • good whiteness rendition,
  • good blackening,
  • low flares,
  • sharp image already from 1.8 metres,
  • good quality BaK-4 prisms,
  • efficiently working dielectric coatings on the prisms ensure good transmission,
  • long guarantee period.

Cons:
  • distinctly egg-shaped pupils which limit light so diligently saved by good coatings,
  • distinct chromatic aberration at the edge of the field of view,
  • a bit too high light fall-off at the edge.


In the next stage of the 10x42 binoculars test five very similar instruments competed against each other. In alphabetical order these are as follows: the Bynolyt Buzzard SHR, the Ecotone AD-7, the Fomei Diplomat, the Opticron Verano and the Vixen Apex Pro. The chart below shows a comparison of properties and prices of those instruments.


As you see, the parameters of these binoculars are almost identical. All of them are small, handy and light constructions of practically the same weight and the same dimensions and identical field of view. Their exteriors don’t differ either as can be seen in the photo below.


The weight differences are so small we can suspect in every set of binoculars an identical optical system was used in the sense of the number of elements and groups. The instruments can differ slightly when it comes to the eyepieces’ construction which might be suggested by minimal differences in eye relief values, changing from 15 to 17 mm. What’s more, the binoculars have certainly different coatings which is clearly visible if you just glance at their colours and intensity.

When it comes to the score in the test the binoculars occupy exactly the same quality segment. All of them got about 123 points and the difference between the best and the worst amounts to only 2.5 points. It is really not much because 2-4 points constitute the estimated summary error of our testing methods. From the statistical point of view the score differences are practically negligible, although they lead to interesting conclusions.


Common traits of all the binoculars are quite visible. Because of small dimensions the prisms distinctly limit the light access through egg-shaped pupils. That effect is bigger for the left pupil. Short and small construction is also the source of problems with chromatic aberration correction. The eyepieces with the 60-degree-wide field of view don’t show sharp images to the very edge and about 20% of the field is visibly blurred. The binoculars’ transmission level is not impressive (apart from the Buzzard) because of the light loss on vignetting pupils and aluminum coatings on the prisms (only the Bynolyt used better SHR coatings).

It’s worth noticing that the Vixen, which is the cheapest, fared the best of these five devices. Vixen is a Japanese company after all and its factory is also situated in Japan. If you are close to the factory you can control it efficiently and cut costs at the same time.

One of the most expensive binoculars here is the Bynolyt Buzzard. The higher price can be justified by using special coatings on the prisms which enhance transmission (SHR). The test score seems to confirm it fully. In categories connected with the coatings (transmission, flares or coatings) the Bynolyt fares significantly better than the competitors although it wastes that advantage in other categories. If you consider transmission and a long guarantee period to be very important features the Bynolyt will be an excellent choice.

The next interesting suggestion is the Ecotone AD-7. Its score is the worst in this group but the price/quality ratio undoubtedly the best. Certainly it is a product worth pondering.

Perhaps the most difficult positions occupy the Fomei Diplomat and the Opticron Verano. For a really significant amount of money, compared to their rivals they offer nothing more than good guarantee conditions. When it comes to the optics and build quality their level is exactly the same as that of twice cheaper instruments from Vixen and Ecotone. Opticron Verrano is a bit lighter and it might be also a serious asset.