ZEISS 8×40 SFL Binoculars
SmartFocus Lightweight — Precision, Portability, and Power
The ZEISS 8×40 SFL binoculars are engineered for those who demand top-tier performance in a lighter, more compact body. Whether you’re hiking, birding, or scouting terrain, these binoculars deliver remarkable clarity, brilliant low-light performance, and comfort — built with ZEISS’s highest optical standards.
🔍 Key Features
SmartFocus Concept
The focus wheel is perfectly positioned on the DoubleLink Bridge. You get fast, precise focusing with just 1.4 turns from minimum focus to infinity, operable even with gloves. Zeiss+1
Ultra-High Definition (UHD) Optical System
New UHD lens design with enhanced coatings ensures true‑to‑life color reproduction and exceptional detail, especially at the edges of the field. Zeiss+2sportsoptics-shop.zeiss.com+2
LotuTec® & ZEISS T* Coatings
Hydrophobic coatings (LotuTec) help repel water, dirt, and grime. The T* multicoating improves light transmission and contrast, especially in twilight or adverse lighting. sportsoptics-shop.zeiss.com+2Zeiss+2
Lightweight Magnesium Housing
Smaller lens diameter (40 mm vs 42 mm) and thinner lens elements allow the body to be lighter (~20% less) and shorter (~13%) than comparable binoculars, including ZEISS Victory SF models. Zeiss+1
Large Exit Pupil & Wide Field of View
Offers a generous exit pupil and expansive field of view for relaxed observing, broad scenes, and low-light performance. Zeiss+1
🔧 Technical Specifications
| Specification | Details |
|---|---|
| Magnification | 8× Zeiss |
| Objective Lens Diameter | 40 mm Zeiss |
| Light Transmission | ~90% sportsoptics-shop.zeiss.com+1 |
| Exit Pupil Diameter | 5.0 mm Zeiss+1 |
| Twilight Factor | ~17.9 Zeiss+1 |
| Field of View | 140 m @ 1,000 m (≈ 420 ft @ 1,000 yd) Zeiss+1 |
| Close Focus Distance | 1.5 m (≈ 4.9 ft) Zeiss+1 |
| Diopter Adjustment Range | ±4.0 dpt Zeiss+1 |
| Eye Relief / Exit Pupil Distance | ~18 mm Zeiss+1 |
| Interpupillary Distance | 52‑74 mm sportsoptics-shop.zeiss.com+1 |
| Prism System | Schmidt‑Pechan Zeiss |
| Weatherproofing / Water Resistance | 400 mbar; Nitrogen‑filled & fog‑proof sportsoptics-shop.zeiss.com+1 |
| Operating Temperature | ‑20 °C to +55 °C (‑4 °F to +131 °F) Zeiss+1 |
| Dimensions | Length: ~144 mm; Width (at 65 mm IPD): ~114 mm sportsoptics-shop.zeiss.com+1 |
| Weight | ~640 g (Approx. 22.6 oz) sportsoptics-shop.zeiss.com+1 |
🎯 Why Choose ZEISS 8×40 SFL
Perfect balance of light gathering & portability. The 40 mm objectives give excellent light intake without the bulk of larger lenses.
Ideal for twilight and low-light use. High light transmission, wide exit pupil, and coatings deliver solid performance at dawn/dusk.
Built rugged for real-world conditions. Weather‑sealed, reliable in wet/humid situations.
Ergonomics matter. SmartFocus wheel and lighter body reduce fatigue on long viewing sessions.
If you like, I can also pull together a side‑by‑side comparison of the 8×40 SFL vs the 10×40 SFL or vs other ZEISS lines (Victory SF, Terra ED, etc.), so you can see what trade‑offs you get.
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