GPO Passion HD 12.5x50 specs and field of view
At 12.5x it magnifies more than the 10x and 8x models in the Passion HD series. The field of view narrows to 286 ft, and the twilight factor works out to 25.
- Field of view
- 286 ftat 1,000 yd
- Eye relief
- 16.5 mm
- Close focus
- 9.8 ft
- Weight
- 34.1 oz
- Exit pupil
- 4 mmcalculated
Why pick it
- 16.5 mm eye relief, enough for glasses
- Waterproof
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Who the Passion HD 12.5x50 suits
Distant targets such as far shorelines or wildlife on a ridge suit the 12.5x power. Eye relief of 16.5 mm leaves some room for glasses.
Weight is 34.1 oz and the calculated exit pupil is 4 mm, so low light is not its strength.
Passion HD 12.5x50 aside, the most popular models of all sizes are in our best binoculars comparison. GPO lists it in the $1,000 to $2,000 price band, alongside the models in best binoculars over $1,000.
Passion HD 12.5x50 specifications
Passion HD 12.5x50 figures as GPO prints them; rows marked * are calculated from the 12.5x50 size.
| Magnification | 12.5x |
|---|---|
| Objective lens | 50 mm |
| Prism type | Roof |
| Field of view | 286 ft at 1,000 yd (95 m at 1,000 m) |
| Angular field of view | 5.4° |
| Apparent field of view | 68° * |
| Eye relief | 16.5 mm |
| Close focus | 9.8 ft (3 m) |
| Eye spacing range | 58 to 76 mm |
| Weight | 34.1 oz (967 g) |
| Waterproofing | 500 mbar |
| Maker list price | $1,000 to $2,000 |
| Exit pupil | 4 mm * |
| Twilight factor | 25 * |
| Relative brightness | 16 * |
* Calculated from the size, not printed by the maker.
Other sizes of the Passion HD
GPO makes the Passion HD 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 | Amazon |
|---|---|---|---|---|---|---|---|
| GPO Passion HD 12.5x50 | 12.5x50 | 286 ft | 16.5 mm | 9.8 ft | 34.1 oz | 4 mm | Check price on Amazon |
| GPO Passion HD 8x42 | 8x42 | 375 ft | 19.5 mm | 6.5 ft | 29.3 oz | 5.3 mm | |
| GPO Passion HD 10x42 | 10x42 | 366 ft | 17 mm | 6.5 ft | 29.6 oz | 4.2 mm | |
| GPO Passion HD 8.5x50 | 8.5x50 | 315 ft | 19.5 mm | 9.8 ft | 33.2 oz | 5.9 mm | |
| GPO Passion HD 10x50 | 10x50 | 309 ft | 19.5 mm | 9.8 ft | 33.9 oz | 5 mm | |
| GPO Passion HD 15x50 | 15x50 | 266 ft | 16.5 mm | 9.8 ft | 34.1 oz | 3.3 mm | Check price on Amazon |
GPO binoculars
Passion HD 12.5x50 questions
Passion HD 12.5x50: does it work with glasses?
Passion HD 12.5x50 has 16.5 mm of eye relief, which meets the 16 mm the RSPB advises for people who wear glasses.
Passion HD 12.5x50: what does 12.5x50 mean?
Passion HD 12.5x50 magnifies 12.5 times through 50 mm front lenses, which works out to an exit pupil of 4 mm, the width of the beam of light that reaches each eye.