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One with the moment.
The NL Pure 12x42 brings long-range detail into an exceptionally wide 113 m field of view. SWAROVISION optics, 91% light transmission and a sculpted ergonomic body make it a specialist binocular for distant wildlife, open country and mountain observation.
NL Pure 12x42 Green
12× detail without tunnel vision.
A 6.5° true field and 71° apparent field place the subject inside a broad, natural-looking viewing window. Field-flattener lenses maintain sharp contours toward the edge, while premium lens and prism coatings support high contrast, colour fidelity and dependable low-light performance.
Designed around what you see.
The compact roof-prism system and narrowed central body reduce visual distraction and hand fatigue. The result is a binocular that feels less like equipment and more like a direct connection to the landscape.
Keep the whole scene in sight.
At 12×, the NL Pure still delivers a true field of 6.5°—113 m at 1,000 m. That breadth makes it quicker to find a subject, easier to follow movement and simpler to retain environmental context.
The 71° apparent field creates an immersive image in which the edge of the viewing circle is barely perceptible.
Sharp, high-contrast and faithful to colour.
Field-flattener lenses support edge-to-edge definition, helping fine structures remain legible across the image. Fluoride-containing HD glass elements reduce colour fringing, while SWAROTOP anti-reflective lens coatings and the SWAROBRIGHT prism system maximise transmission and colour fidelity. SWARODUR forms part of the optical coating system.
The payoff is a neutral, detailed view that stays useful in difficult light—from first light in the hills to the final minutes of evening observation.

Made to disappear into your hands.
The narrowed central body and oval recess between thumb and forefinger create a naturally secure hold. A balanced magnesium chassis keeps the 42 mm binocular composed in the hands, while the large central focusing wheel remains easy to reach without shifting grip.
For extended glassing, the optional FRP forehead rest can create a third point of contact and reduce small movements—particularly useful at 12×. A steady stance, a braced grip or tripod support helps you make the most of the extra magnification.
Mountain-ready construction.
A compact magnesium housing, protective rubber armouring and inert-gas filling make the NL Pure ready for changing temperatures, heavy rain and demanding field use. It is submersion-tight to 4 m and specified to operate from −25°C to +55°C.
Adjust it precisely to you.
Four eyecup positions, generous eye relief, independent diopter correction and a broad interpupillary range make it straightforward to obtain one clean, shadow-free viewing circle.
Everything where it should be.
Explore the focusing controls, eyecups and attachment points. Hover, focus or tap a numbered marker to see the part name.
Move keyboard focus to a numbered marker, hover it with a pointer, or tap it on a touch screen to reveal the corresponding part name.
- 1Twist-in eyecups
Use the four positions to set the correct eye distance with or without glasses.
- 2Diopter adjustment
Balances differences between the left and right eye, with a defined zero position.
- 3Focusing wheel
Moves smoothly from the 2.6 m close-focus distance through to infinity.
- 4TAs connection
Accepts the optional Swarovski TAs tripod adapter on units from serial AD1452771A. Earlier NL Pure 42 units require a Swarovski retrofit.
- 5Strap connector covers
Protect the side connection points when the carrying-strap fittings are removed.
- 642 mm objectives
Combine with 12× magnification to provide a 3.5 mm exit pupil, with 91% light transmission through the optical system.
- 7Ergonomic wasp waist
Creates the NL Pure’s characteristic waist and gives the fingers a natural, secure hold.
A precise view in a few steps.
Start with the eyecups and interpupillary distance, then calibrate the diopter. These settings establish the complete viewing field and keep both eyes sharply focused.
1. Set the eyecups
Without glasses, twist counterclockwise fully out. With glasses, twist clockwise fully in. Use either intermediate stop if it gives a cleaner full field.
2. Set eye spacing
Move the binocular halves at the central hinge until both fields merge into one circular image with no dark shadows around the edge.
3. Calibrate the diopter
Focus the left eye with the main wheel, then keep that setting and use the diopter control to sharpen the image for the right eye.
4. Focus near to far
Turn the central focusing wheel to move continuously from the 2.6 m minimum focus distance through to infinity.
5. Manage the lens covers
Pull the objective covers down for viewing. They can be removed and the supplied filler pieces inserted when an uncovered front end is preferred.
6. Attach the carrying strap
Seat the strap-loop connectors securely in the side fittings and check both connections before carrying the binocular in the field.
Purpose-built accessories.
Add support, digiscoping or glare control without compromising the NL Pure’s clean handling.
Optional · sold separately FRP forehead rest
Adds a third contact point for steadier, more comfortable observation and can be adjusted to the user’s forehead.
Optional · sold separately TAs tripod adapter
Provides ARCA-SWISS-compatible tripod support for extended glassing. Fits NL Pure 42 units from serial AD1452771A; earlier units require a Swarovski retrofit.
Optional · sold separately VPA 2 phone adapter + CA-B
Aligns a compatible smartphone camera with the eyepiece for digiscoping. The NL Pure 42 uses the CA-B clamp adapter.
Optional · sold separately WES winged eyecup set
Shields the eyes from distracting side light to improve viewing comfort and contrast in bright or low-angle sun.
Complete specifications.
Optical, mechanical and environmental details for the Swarovski NL Pure 12x42 Green.
| Product identification | |
|---|---|
| Product | Swarovski Optik NL Pure 12x42 |
| Colour | Swarovski Green |
| Manufacturer product code | NL-1S4LB0-0 |
| Optical design | Premium wide-angle roof-prism binocular; inert-gas filled |
| Country of origin | Austria |
| Optical performance | |
| Magnification | 12× |
| Effective objective diameter | 42 mm |
| Exit pupil diameter | 3.5 mm |
| Exit pupil distance / eye relief | 18 mm / 0.71 in |
| Field of view at 1,000 m | 113 m |
| Field of view at 1,000 yd | 339 ft |
| True angular field of view | 6.5° |
| Field of view for spectacle wearers | 6.5° |
| Apparent field of view | 71° |
| Shortest focusing distance | 2.6 m / 8.5 ft |
| Light transmission | 91% |
| Twilight factor (ISO 14132-1) | 22.4 |
| Optical elements | 24 |
| Optical technologies | SWAROVISION system with field-flattener lenses and fluoride-containing HD glass; SWAROBRIGHT prism coating, SWAROTOP and SWARODUR coatings |
| Adjustment and handling | |
| Diopter adjustment | Left / right: ±4 dpt |
| Diopter correction at infinity | 5 dpt |
| Interpupillary distance | 56–74 mm / 2.2–2.9 in |
| Eyecups | Twist-in design with four positions: fully in, fully out and two intermediate stops |
| Focusing | Large central focusing wheel; integrated independent diopter adjustment |
| Tripod interface | Optional TAs adapter fits from serial AD1452771A; earlier NL Pure 42 units require a Swarovski retrofit |
| Dimensions and construction | |
| Length | 158 mm / 6.2 in, with eyecups retracted |
| Width | 131 mm / 5.16 in |
| Height / depth | 71 mm / 2.8 in |
| Weight | Approximately 840 g / 29.6 oz |
| Housing | Compact magnesium chassis with protective rubber armouring |
| Colour finish | Green rubber armour with black control and trim components |
| Environmental protection | |
| Submersion tightness | 4 m / 13 ft; inert-gas filling |
| Functional temperature | −25 to +55°C / −13 to +131°F |
| Storage temperature | −30 to +70°C / −22 to +158°F |
Length measured with eyecups retracted; width and height measured at a 64 mm interpupillary distance.
What is in the box.
| Binocular | Swarovski NL Pure 12x42 in Green |
|---|---|
| Carrying system | UCS universal comfort strap and FSB-L functional sidebag |
| Lens protection | Eyepiece cover / ocular rainguard and two objective lens covers |
| Fittings | Two objective-cover filler pieces and strap / objective connector components |
| Documentation | Operating instructions and product information |
Optional FRP, TAs, VPA 2 / CA-B and WES accessories are sold separately.
Manuals and technical data.
Manufacturer documents for setup, care, specifications and compatible accessory installation.
Product information is presented for the green NL Pure 12x42, manufacturer code NL-1S4LB0-0. Always follow the current Swarovski Optik operating and care instructions.







