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Binoculars review

Swarovski NL Pure 8x32

Swarovski NL Pure 8x32
11 July 2024
Optyczne.pl 
Lately we have seen a real offensive of the Swarovski Optik company when it comes to top-of-the-range binoculars of the highest price and performance series. First, on 1st July 2020 we saw the launch of the new series called NL Pure (NL from Nature Lover). It consists of three roof prism models with the following parameters: 8x42, 10x42 and 12x42. As it befits the top-of-the-range series of a renowned producer they are supposed to offer all the best: excellent optics joined with high quality antireflection SWAROTOP and SWARODUR coatings on all air-to-glass surfaces (minimizing losses of light to 0.2% on one surface) and reflective dielectric SWAROBRIGHT coatings on one of surfaces of Schmidt- Pechan roof prisms system.


Swarovski NL Pure 10x42 binoculars.

A truly intriguing shape of binoculars' contoured barrels, with untypical indentations in places where you usually place your hands to hold the instrument, sticks out at once. It was explained that the location of roof prisms had been changed (they were rotated relative to each other) in order to allow such a profile of the binoculars' barrels. As a result the instrument became more comfortable and safer to hold, ensuring a firmer grip.

Fields of view of the new binoculars are the second, very interesting thing. The 8x42 model features a field of view as wide as 9.1 degrees, the 10x42 instrument's field of view is 7.6 degrees and the 12x42 binoculars feature a field as wide as 6.5 degrees. Construction of such wide angle eyepieces that, additionally, are supposed to correct properly optical aberrations up to the very edge of the field and assure you a comfortable eye relief, amounting to 18 mm, needs without doubt a complex optical system. Despite that complexity Swarovski claimed that the overall transmission of their new binoculars reaches a very high level of 91%. Our later tests confirmed that declaration of the producer.


Swarovski NL Pure 10x32 binoculars in orange version.

In April 2021 the NL Pure line was complemented by the 8x32 and 10x32 models. Their fields of view are a bit narrower, amounting to 8.5 and 7.5 deg respectively, but the producer declared that the transmission of binoculars is supposed to reach 92% so one percentage point more than models with objective lenses of 42 mm.


NL Pure bunoculars lineup.

On 13th June 2024 we found out that Swarovski Optik haven't said their last word yet in this class of equipment. Then we saw a launch of two other NL Pure line models with quite untypical parameters: 10x52 and 14x52.

It's worth adding that you don't deal here with small, lightweight instruments. The weight of the 32 mm NL Pure reaches as much as 640 grams – you can find many 42 mm class binoculars on the market with a similar weight. For those who like small, handy, and light Swarovski models there is the very well-put-together and noticeably cheaper CL Companion series.

The binoculars are designed as the Schmidt-Pechan optical system and their casings are nitrogen-pured and waterproof up to a depth of 4 meters. They are able to work in the temperature range from -25 to +55 °C and be stored in temperatures from -30 to +70 °C. Their casing comes in two colour variants.

Buyers get in the box: caps for objectives and a rainguard, a strap, a very stylish case with a separate strap, a brush, soap and a cleaning cloth. The product comes with a 10-year warranty period of the producer.

Pictures
  • Lornetka Swarovski NL Pure 8x32
  • Lornetka Swarovski NL Pure 8x32
  • Lornetka Swarovski NL Pure 8x32
  • Lornetka Swarovski NL Pure 8x32
Manufacturer data

Manufacturer:

Swarovski
web site

Distribution / Sales:

Beafoto
web site

Magnification Lens diameter Angular field of view Prisms Eye relief Weight Price
8 32 150/1000(8.5o) BaK-4/roof 18 mm 640 g 10600 PLN
Results of the review
Real front lens diameter Left:   32.15+/- 0.05 mm
Right:  32.18+/- 0.05 mm
8 / 8.0 pkt
Real magnification 8.06+/- 0.05x 3/3.0
Transmission 89.5+/- 1% 17/25.0
Chromatic aberration Practically zero in the centre, a bit lower than medium on the edge. 8.5/10.0
Astigmatism Imperceptible. Almost ideally point-like images of stars. 9.5/10.0
Distortion Distance of the first curved line from the field of view centre compared to the field of view radius: 82% ± 3% 10/10.0
Coma Appears in a distance of 70% from the field centre and is low on the very edge. 8/10.0
Blurring at the edge of the FOV By and large sharpness remains the same up to the very diaphragm, very nicely cut off. 10/10.0
Darkening at the edge the FOV Negligible. 4.5/5.0
Whiteness of the image Very good, practically without any colouring. The transmission graph with a slight surplus of blue light and sometimes it makes itself felt, especially when you observe something under a blue, cloudless sky. 4.7/5.0
Collimation Perfect. 5/5.0
Internal reflections
Left: Right:
Swarovski NL Pure 8x32 - Internal reflections - Left Swarovski NL Pure 8x32 - Internal reflections - Right
Some reflections near the exit pupil.
3.7/5.0
Housing Very solid, sleek, but relatively long for the 32 mm class. The profiled casing, shaped so because of the turning of the prisms, fits your hands very well so the binoculars are a joy to hold and to look through. Objective lenses are hidden inside the casing over 1 cm deep in the tubes. The rubber armour sticks to the body very well, is slightly rough, and quite nice to hold. Rubberized eyecups fit your eyesockets well and they have four detention stops. The binoculars are produced in Austria. 7.9/8.0
Focusing The build-in central wheel surrounded by a bridge; behind it you find a small joystick for dioptre correction. It moves smoothly but with a relatively small resistance. As it is typical for Swarovski instruments, you have to turn it a lot. Its focus throw amounts to an angle of about 710-720 deg. 5/5.0
Tripod You can buy an andditional brand-name attachment. In our 8x32 test all binoculars were granted an average value of 1.5 points because tripod exits are rarely used in this class of equipment. 1.5/3.0
Interpupilary distance from 54.9 to 72mm 3/6.0
Closest focusing distance 1.9 meters. 1.5/2.0
Eyepieces FOV Apparent field of view of 68.0 deg (simplified formula) and 61.5 deg (tangent formula). 15/20.0
Field of view Measured by us amounted to 8.44 ± 0.04 deg and was slightly narrower than declared in official specifications. A huge field for this class of equipment. 7.5/8.0
Quality of the interior of the barrels Interiors of the tubes are dark, matt, and ribbed in many places. Bottoms near the prisms are as well dark and matt. The edge of the sleeve that goes round the focusing element is a bit too bright. Additionally, when the focusing element moves toward the prisms and eyepieces, it reveals an inner tube that is as bright, even though still quite matt. The cleanliness inside the binoculars is exemplary for a change - we didn't find any specks of dust or dirt. 4.2/5.0
Vignetting
Left: Right:
Swarovski NL Pure 8x32 - Vignetting - Left Swarovski NL Pure 8x32 - Vignetting - Right
OL: 0.09%, OR: 0.45%.
7.5/8.0
Prisms quality High quality BaK-4. 8/8.0
Antireflection coatings Green-yellow-purple on objectives, green-yellow on the prisms, pink-green-yellow on the eyepieces. Low intensity. 5/5.0
Warranty [years] 10 4.5/6.0
Final result
85.5%
162.5 / 190 pkt
Econo result 0pkt.

Summary


Pros:
  • solid and stylish casing,
  • wide field of view,
  • good transmission, in accordance with official declarations,
  • very good colour rendering,
  • sharp images practically across the whole field of view,
  • sensationally corrected astigmatism,
  • slight chromatic aberration,
  • very low distortion,
  • low coma on the edge of the field of view,
  • sensible blackening and cleanliness inside the tubes,
  • coatings of excellent quality,
  • negligible brightness loss on the edge of the field of view,
  • high quality prisms made of BaK-4 glass.

Cons:
  • price?

Record-breaking or almost record-breaking fields of view are the characteristic trait of practically all NL Pure series binoculars. There's just one exception – the 8x32 model, in which case the field amounts to 8.5 deg. Don't get me wrong, such a field is not narrow, after all it needs eyepieces with a field of as much as 68 deg (according to the simplified formula). The problem is that such fields in small 8x30 and 8x32 devices are nothing new, we have seen thme from nearly one hundred years. In 1920 Zeiss from Jena prestented two 8x30 models, the Deltrentis and the Deltrintem, which fields amounted to exactly 8.5 deg; seven years later Leitz showed the Binux and the Binuxit models with the same parameters.

Currently a field of 8.5 deg in 8x32 binoculars is wide but certainly not record-breaking. The NL Pure 8x32 has to compete with such rivals as the Zeiss Victory SF 8x32 or the Nikon 8x30 EII, with fields as large as 8.8 deg. Even the Kowa BDII32-8XD 8x32, a pair of binos that is also cheaper, lighter, and handier, is able to offer you a field wider than the Swarovski, as you can notice by consulting the following chart.

The decision of the Swarovski is so surprising because in case of the 10x32 model they managed to introduce a truly record-breaking field, reaching as much as 7.5 deg, wider than the field of the Zeiss Victory, 7.4 degrees, exactly 7 degrees of the Nikon 10x35 EII, and 6.7 deg. Of the Kowa BDII32-10XD 10x32.

Such a lack of a record-breaking field in the 8x32 class is not caused by limitations concerning the weight and dimensions because the NL Pure 8x32 belongs to one of the biggest and heaviest binoculars of this class. Our measurements show the weight (with caps attached to the eyepieces) of 672 grams and the length reaches 144 mm. Many 8x42 binoculars boast similar physical dimensions – it's enough you glance at the photo below here the tested NL Pure 8x32 is positioned next to the Vortex Razor HD 8x42.


Swarovski NL Pure 8x32 and Vortex Razor HD 8x42.

The size of the field matters but its correction is equally important; in this case Swarovski remains beyond reproach. The binoculars' images are sharp practically up to the very diaphragm, brightness loss on the edges is negligible, astigmatism amounts to zero, coma is low, distortion- slight, and chromatic aberration in the centre practically imperceptime (being a bit lower than medium on the very edge). In other words here you deal with an instrument as close to perfect as it is possible.

Swarovski binoculars have been known for their excellent colour rendering. They owe it to the best and newest types of glass, and excellent antireflection coatings that cover all air-to-glass surfaces.

In case of the NL Pure 32 mm models these coatings are supposed to work so well that the producer declares their transmission reaches as much as 92%, a huge achievement, taking into account the fact that the optical system features lossy Schmidt-Pechan prisms. We decided to check that claim of course and the graph below helped us to do so.

You can observe here a very interesting thing. Usually transmission graphs of Swarovski binoculars are very flat, keeping the highest level near 90% across the whole visible spectrum, including blue and purple light. In this case exactly the shortest range of the visible spectrum was taken care of the most, with transmission being the highest for blue light. The declared 92% are reached in the wavelength range from 422 to 467 nm. Then the transmission decreases slightly, descending below 90% for green-yellow light.

I have to admit such an approach is a surprise for me. You can understand it up to a point because the sensitivity of our organ of vision is the biggest for green-yellow light and then decreases quite quickly as you move towards ultraviolet. Such a construction of the transmission curve compensates such an effect so images provided by the NL Pure 8x32 seem to be cristal clear and white in the majority of cases. Still the slight surplus of blue-purple light might make itself felt in a moment when you observe something under cloudless sky that shines blue, due to Rayleigh scattering that accounts for the colour of the sky. In such conditions images provided by NL Pure might seem a tad too cold. Still you have to be aware of the fact that we talk here about colour nuances that, additionally, are influenced by individual vision. Overall brightness, clarity, and colouring provided by the tested pair of binoculars are on a very high level.

The final result of the NL Pure 8x32 in our test is so high that it managed to get the first place of our ranking. It defeated the Zeiss Victory SF 8x32 but only by a hair's breadth; taking into account all the measuring errors the results of both binoculars should be considered identical. They are really worth each other – the Zeiss is able to offer a better field of view and a bit different transmission curve, something that will be appreciated by users who prefer their images a bit warmer.

Overall, we, the customers, should be pleased that the biggest players on the market are able to compete on such a high quality level. If only that competition was reflected also in prices, and such pairs of binoculars could be bought for less than 2000 USD... I wish you and myself that exactly.