Zeiss SFL 10×40 Binoculars
The Zeiss SFL 10×40 is the lightweight member of Zeiss’s high-performance binocular range, built for stalkers and hunters who count every gram in the pack or around the neck. SFL stands for SmartFocus Lightweight: a magnesium housing and reduced-diameter objectives bring the all-up weight down to 640g, yet the 40mm lenses and Zeiss’s UHD optical concept still deliver true-to-life colour and the fine detail you need to age a beast or pick a roe out of dead ground. The SmartFocus wheel sits in the DoubleLink bridge and runs just 1.4 turns from close focus to infinity, so you can focus fast and precisely even in gloves. With 90% light transmission and Zeiss T* multi-coating, the 10×40 holds its own into twilight, while the 4mm exit pupil and 18mm eye relief make for relaxed, comfortable viewing.
Specifications
| Feature | Value |
|---|---|
| Objective Lens Diameter | 40mm |
| Magnification | 10x |
| Exit Pupil | 4mm |
| Eye Relief | 18mm |
| Weight | 640g |
| Focus Range | 1.4 turns (close focus to infinity) |
| Optical Technology | UHD, T* multi-coating |
| Light Transmission | 90% |
FAQ
What makes the Zeiss SFL 10×40 different from other binoculars in its range?
The SFL 10×40 features a magnesium housing and reduced-diameter objectives, which reduce its weight to 640g while maintaining 40mm lenses and Zeiss’s UHD optical concept for sharp detail and true-to-life colour.
How does the SmartFocus wheel improve usability?
The SmartFocus wheel operates in just 1.4 turns from close focus to infinity, allowing for fast and precise focusing, even when wearing gloves.
Can these binoculars be used in low light conditions?
Yes, with 90% light transmission and Zeiss T* multi-coating, the binoculars perform well into twilight conditions.
Abigail Lambert –
These binoculars are incredibly light for their magnification. I use them on game walks and can easily carry them for long hours. The focus is quick and accurate, even in cold weather with gloves on. The image clarity is excellent, especially in early morning light.
Peter Hart –
The 10×40 offers a good balance between size and performance. The 4mm exit pupil is just right for natural light conditions. I noticed sharp detail when spotting birds in the woods and the color reproduction is very true to life.
Trevor Lyman –
I appreciate the lightweight design and the fast focus. The binoculars are comfortable to hold for extended periods. In slightly dim conditions, the image is still clear, though not as bright as in full daylight.