ZEISS SFL 8×40
Model 524023-0000-000
The ZEISS SFL 8×40 binoculars combine 8× magnification with 40 mm objective lenses in a compact design built for outdoor observation. A wide 420 ft field of view at 1,000 yards helps you scan landscapes, while 90% light transmission supports bright, detailed viewing. Nitrogen-filled construction, 400 mbar water resistance, and LotuTec lens coating help the binoculars handle changing weather. With close focusing down to 4.9 ft, the SFL 8×40 is suited to wildlife watching, hiking, and everyday use in the field.
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Key Features
The ZEISS SFL 8×40 combines lightweight design and premium optics with reliable weather protection, making it a versatile choice for wildlife observation, hiking, and outdoor adventures.
8x
Magnification
40 mm
Objective Lens
90%
Light Transmission
400 mbar
Water Resistance
420 ft
Field of View at 1,000 yd
LotuTec
Protective Lens Coating
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Quick Specifications
| Specification | Details |
|---|---|
| Magnification | 8× |
| Objective Lens Diameter | 40 mm |
| Exit Pupil Diameter | 5.0 mm |
| Light Transmission | 90% |
| Field of View at 1,000 yd | 420 ft |
| Close Focusing Distance | 4.9 ft |
| Eye Relief | 18 mm |
| Interpupillary Distance | 52–74 mm |
| Water Resistance | 400 mbar |
| Weight | 22.6 oz |
About This Model
The ZEISS SFL 8×40 is a premium binocular designed for outdoor observation, combining 8× magnification with 40 mm objective lenses in a compact, lightweight body. Its 5 mm exit pupil, 90% light transmission, and 420 ft field of view at 1,000 yards support comfortable viewing and broad landscape coverage. With a close focusing distance of 4.9 ft, the binoculars can also be used to observe nearby subjects in detail.
The SFL 8×40 features ZEISS T* and LotuTec lens coatings, Schmidt-Pechan prisms, and nitrogen-filled construction. Its specified water resistance of 400 mbar helps protect the optical system in wet outdoor conditions, while the nitrogen-filled design helps prevent internal fogging caused by temperature changes. These features make the model suitable for wildlife observation, hiking, and other outdoor activities where dependable optical performance matters.
Measuring 5.7 inches long and weighing 22.6 oz, the ZEISS SFL 8×40 is designed to balance optical performance with portability. The interpupillary distance adjusts from 52 to 74 mm, and the diopter adjustment range is ±4 diopters. Its operating temperature range is −4°F to +131°F. Together, these specifications make the SFL 8×40 a versatile option for users seeking premium waterproof binoculars without the bulk of larger optical instruments.
Full Specifications
The ZEISS SFL 8×40 binoculars combine 8× magnification with 40 mm objective lenses, 90% light transmission, and a wide 420 ft field of view at 1,000 yards. Designed for wildlife observation, hiking, and outdoor use, they feature a compact magnesium body, Schmidt-Pechan prisms, ZEISS T* coatings, and LotuTec lens protection. Nitrogen-filled construction and 400 mbar water resistance help protect the optics in wet conditions, while a close focus of 4.9 ft supports detailed viewing at short distances.
| Specification | Details |
|---|---|
| Model | ZEISS SFL 8×40 |
| Binocular Type | Roof-prism binoculars |
| Magnification | 8× |
| Effective Objective Lens Diameter | 40 mm |
| Light Transmission | 90% |
| Exit Pupil Diameter | 5.0 mm |
| Twilight Factor | 17.9 |
| Field of View at 1,000 yd | 420 ft |
| Field of View at 1,000 m | 140 m |
| Apparent Field of View | 60° |
| Close Focusing Distance | 4.9 ft |
| Eye Relief | 18 mm |
| Diopter Adjustment Range | ±4 diopters |
| Interpupillary Distance | 52–74 mm |
| Prism System | Schmidt-Pechan |
| Lens Coating | ZEISS T* |
| Protective Lens Coating | LotuTec |
| FieldFlattener Technology | Yes |
| Ultra-HD Concept | Yes |
| Body Material | Magnesium |
| Nitrogen Filling | Yes |
| Water Resistance | 400 mbar |
| Specified Submersion Protection | Up to 13 ft for 2 hours |
| Operating Temperature | −4°F to +131°F |
| Length | 5.7 in |
| Width at 65 mm Interpupillary Distance | 4.5 in |
| Weight | 22.6 oz |
| Included Accessories | Neoprene carrying strap, carrying bag, eyepiece and lens protection, microfiber cloth, user instructions, and safety information |
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