Fujinon 16x70 FMTR-SX specs and field of view
The calculated twilight factor of 33.5 is the highest in the Fujinon range here. The 16x70 FMTR-SX also shows a 210 ft field at 1,000 yd.
- Field of view
- 210 ftat 1,000 yd
- Eye relief
- 15.5 mm
- Close focus
- 168 ft
- Weight
- 67.7 oz
- Exit pupil
- 4.4 mmcalculated
Why pick it
- Waterproof
Who the 16x70 FMTR-SX suits
Distant targets and astronomy suit a 70 mm objective, and the calculated exit pupil of 4.4 mm is sensible at 16x. Eye relief is 15.5 mm.
Close focus is 168 ft and the weight is 67.7 oz, so this glass needs a mount and a distant subject.
16x70 FMTR-SX is one choice among many, and the top binoculars compared covers the most popular ones.
16x70 FMTR-SX specifications
16x70 FMTR-SX figures as Fujinon prints them; rows marked * are calculated from the 16x70 size.
| Magnification | 16x |
|---|---|
| Objective lens | 70 mm |
| Field of view | 210 ft at 1,000 yd (70 m at 1,000 m) |
| Angular field of view | 4° |
| Apparent field of view | 58.4° |
| Eye relief | 15.5 mm |
| Close focus | 168 ft (51.2 m) |
| Eye spacing range | 56 to 74 mm |
| Weight | 67.7 oz (1,920 g) |
| Width | 9.4 in (238 mm) |
| Waterproofing | 2m-5min |
| Focus system | Individual eyepiece focus |
| Exit pupil | 4.4 mm * |
| Twilight factor | 33.5 * |
| Relative brightness | 19.1 * |
* Calculated from the size, not printed by the maker.
Other sizes of the FMT (Polaris)
Fujinon makes the FMT (Polaris) in 4 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 |
|---|---|---|---|---|---|---|
| Fujinon 16x70 FMTR-SX | 16x70 | 210 ft | 15.5 mm | 168 ft | 67.7 oz | 4.4 mm |
| Fujinon 7x50 FMTR-SX | 7x50 | 393 ft | 23 mm | 32.2 ft | 49.7 oz | 7.1 mm |
| Fujinon 10x50 FMTR-SX | 10x50 | 342 ft | 19.8 mm | 65.6 ft | 50.4 oz | 5 mm |
| Fujinon 10x70 FMTR-SX | 10x70 | 279 ft | 23 mm | 65.6 ft | 70.9 oz | 7 mm |
Fujinon binoculars
16x70 FMTR-SX questions
16x70 FMTR-SX: does it work with glasses?
16x70 FMTR-SX has 15.5 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.
16x70 FMTR-SX: what does 16x70 mean?
16x70 FMTR-SX magnifies 16 times through 70 mm front lenses, which works out to an exit pupil of 4.4 mm, the width of the beam of light that reaches each eye.