Nikon Action EX 16x50 CF specs and field of view
Sixteen power on 50 mm lenses gives the Action EX 16x50 CF a twilight factor calculated at 28.3, with a 183 ft field of view and 17.8 mm eye relief.
- Field of view
- 183 ftat 1,000 yd
- Eye relief
- 17.8 mm
- Close focus
- 23 ft
- Weight
- 36.7 oz
- Exit pupil
- 3.1 mmcalculated
Why pick it
- Longest eye relief of the 2: 17.8 mm
- Waterproof
- Takes a tripod adapter
Who the Action EX 16x50 CF suits
Fixed viewpoints and distant targets suit it, ideally on a tripod. The maker rates it for 1 m / 3.3 ft for 5 minutes, with nitrogen fogproofing.
At 36.7 oz with a 23 ft close focus and a 3.5 degree view, it is heavy and narrow for anything nearby or moving.
Action EX 16x50 CF or another model: the best binoculars by maker figures shows how the popular ones differ.
Action EX 16x50 CF specifications
Action EX 16x50 CF figures as Nikon prints them; rows marked * are calculated from the 16x50 size.
| Magnification | 16x |
|---|---|
| Objective lens | 50 mm |
| Prism type | Porro |
| Field of view | 183 ft at 1,000 yd (61 m at 1,000 m) |
| Angular field of view | 3.5° |
| Apparent field of view | 52.1° |
| Eye relief | 17.8 mm |
| Close focus | 23 ft (7 m) |
| Eye spacing range | 56 to 72 mm |
| Weight | 36.7 oz (1,040 g) |
| Length | 7 in (177 mm) |
| Width | 7.7 in (196 mm) |
| Waterproofing | Up to 1 m / 3.3 ft for 5 minutes |
| Fog-proofing gas | Nitrogen |
| Tripod adaptable | Yes |
| Focus system | Center focus |
| Exit pupil | 3.1 mm * |
| Twilight factor | 28.3 * |
| Relative brightness | 9.8 * |
* Calculated from the size, not printed by the maker.
Action EX 16x50 CF and its nearest rivals
Action EX 16x50 CF next to the 16x50 models closest to it in maker list price, with the best figure in each column in bold.
| Model | Field of view | Eye relief | Close focus | Weight | Exit pupil | Maker list price |
|---|---|---|---|---|---|---|
| Nikon Action EX 16x50 CF | 183 ft | 17.8 mm | 23 ft | 36.7 oz | 3.1 mm | |
| Nikon Action 16x50 | 220 ft | 13 mm | 26.2 ft | 33.2 oz | 3.1 mm | $100 to $200 |
Other sizes of the Action EX
Nikon makes the Action EX in 6 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 |
|---|---|---|---|---|---|---|
| Nikon Action EX 16x50 CF | 16x50 | 183 ft | 17.8 mm | 23 ft | 36.7 oz | 3.1 mm |
| Nikon Action EX 7x35 CF | 7x35 | 489 ft | 17.3 mm | 16.4 ft | 28.2 oz | 5 mm |
| Nikon Action EX 8x40 CF | 8x40 | 429 ft | 17.2 mm | 16.4 ft | 30.2 oz | 5 mm |
| Nikon Action EX 7x50 CF | 7x50 | 336 ft | 17.1 mm | 23 ft | 35.3 oz | 7.1 mm |
| Nikon Action EX 10x50 CF | 10x50 | 342 ft | 17.2 mm | 23 ft | 36 oz | 5 mm |
| Nikon Action EX 12x50 CF | 12x50 | 288 ft | 16.1 mm | 23 ft | 36.9 oz | 4.2 mm |
Nikon binoculars
Action EX 16x50 CF questions
Action EX 16x50 CF: does it work with glasses?
Action EX 16x50 CF has 17.8 mm of eye relief, which meets the 16 mm the RSPB advises for people who wear glasses.
Action EX 16x50 CF: what does 16x50 mean?
Action EX 16x50 CF magnifies 16 times through 50 mm front lenses, which works out to an exit pupil of 3.1 mm, the width of the beam of light that reaches each eye.
Action EX 16x50 CF: can it go on a tripod?
Action EX 16x50 CF is tripod adaptable according to Nikon, so it accepts a binocular tripod adapter.