Fujinon Techno-Stabi TS-L 1640 specs and field of view
ED glass is the extra on the TS-L 1640, a 16x40 stabilized model with a 219 ft field at 1,000 yd. It weighs 30.2 oz.
- Field of view
- 219 ftat 1,000 yd
- Eye relief
- 15.7 mm
- Close focus
- 16.4 ft
- Weight
- 30.2 oz
- Exit pupil
- 2.5 mmcalculated
Why pick it
- Image stabilized
- Waterproof
- ED glass
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Who the Techno-Stabi TS-L 1640 suits
A 4.2 degree view and 15.7 mm eye relief suit steady long looks, and the calculated twilight factor of 25.3 favors detail at distance. The IPX7 rating covers 1 m for 30 min.
The calculated exit pupil is 2.5 mm, so dim light shrinks the advantage, and close focus is 16.4 ft.
Techno-Stabi TS-L 1640 or another model: the best binoculars by maker figures shows how the popular ones differ.
Techno-Stabi TS-L 1640 specifications
Techno-Stabi TS-L 1640 figures as Fujinon prints them; rows marked * are calculated from the 16x40 size.
| Magnification | 16x |
|---|---|
| Objective lens | 40 mm |
| Field of view | 219 ft at 1,000 yd (73 m at 1,000 m) |
| Angular field of view | 4.2° |
| Apparent field of view | 60.8° |
| Eye relief | 15.7 mm |
| Close focus | 16.4 ft (5 m) |
| Eye spacing range | 56 to 70 mm |
| Weight | 30.2 oz (856 g) |
| Width | 4.8 in (122 mm) |
| Extra-low dispersion glass | Yes |
| Waterproofing | 1 m, 30 min (IPX7) |
| Image stabilization | Yes |
| Focus system | Center focus |
| Exit pupil | 2.5 mm * |
| Twilight factor | 25.3 * |
| Relative brightness | 6.3 * |
* Calculated from the size, not printed by the maker.
Other sizes of the Techno-Stabi
Fujinon makes the Techno-Stabi in 5 sizes; a larger front lens adds brightness and weight, and more magnification narrows the view.
| Model | Size | Field of view | Eye relief | Close focus | Weight | Exit pupil | Amazon |
|---|---|---|---|---|---|---|---|
| Fujinon Techno-Stabi TS-L 1640 | 16x40 | 219 ft | 15.7 mm | 16.4 ft | 30.2 oz | 2.5 mm | Check price on Amazon |
| Fujinon Techno-Stabi TS12x28WP | 12x28 | 219 ft | 16.5 mm | 11.5 ft | 17.1 oz | 2.3 mm | Check price on Amazon |
| Fujinon Techno-Stabi TS16x28WP | 16x28 | 210 ft | 16 mm | 11.5 ft | 19.4 oz | 1.8 mm | Check price on Amazon |
| Fujinon Techno-Stabi TS-X 1440 | 14x40 | 210 ft | 13 mm | 16.4 ft | 45.9 oz | 2.9 mm | Check price on Amazon |
| Fujinon Techno-Stabi TS-L 2040 | 20x40 | 178 ft | 15.4 mm | 16.4 ft | 30.1 oz | 2 mm | Check price on Amazon |
Fujinon binoculars
Techno-Stabi TS-L 1640 questions
Techno-Stabi TS-L 1640: does it work with glasses?
Techno-Stabi TS-L 1640 has 15.7 mm of eye relief, under the 16 mm the RSPB advises for people who wear glasses, so the edge of the view may be cut off with glasses on.
Techno-Stabi TS-L 1640: what does 16x40 mean?
Techno-Stabi TS-L 1640 magnifies 16 times through 40 mm front lenses, which works out to an exit pupil of 2.5 mm, the width of the beam of light that reaches each eye.