GPO Passion HD 8.5x50 specs and field of view
The Passion HD 8.5x50 pairs a calculated exit pupil of 5.9 mm with 19.5 mm of eye relief. Field of view is 315 ft.
- Field of view
- 315 ftat 1,000 yd
- Eye relief
- 19.5 mm
- Close focus
- 9.8 ft
- Weight
- 33.2 oz
- Exit pupil
- 5.9 mmcalculated
Why pick it
- 19.5 mm eye relief, enough for glasses
- Waterproof
Who the Passion HD 8.5x50 suits
Dusk watching and glasses use both fit, and the twilight factor works out to 20.6. The weight is 33.2 oz.
Close focus is 9.8 ft and the body is large for casual carrying.
Passion HD 8.5x50 is one choice among many, and the top binoculars compared covers the most popular ones. GPO lists it in the $1,000 to $2,000 price band, alongside the models in best binoculars over $1,000.
Passion HD 8.5x50 specifications
Passion HD 8.5x50 figures as GPO prints them; rows marked * are calculated from the 8.5x50 size.
| Magnification | 8.5x |
|---|---|
| Objective lens | 50 mm |
| Prism type | Roof |
| Field of view | 315 ft at 1,000 yd (105 m at 1,000 m) |
| Angular field of view | 6° |
| Apparent field of view | 51° * |
| Eye relief | 19.5 mm |
| Close focus | 9.8 ft (3 m) |
| Eye spacing range | 58 to 76 mm |
| Weight | 33.2 oz (941 g) |
| Waterproofing | Waterproof and fogproof |
| Maker list price | $1,000 to $2,000 |
| Exit pupil | 5.9 mm * |
| Twilight factor | 20.6 * |
| Relative brightness | 34.6 * |
* 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 8.5x50 | 8.5x50 | 315 ft | 19.5 mm | 9.8 ft | 33.2 oz | 5.9 mm | |
| 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 10x50 | 10x50 | 309 ft | 19.5 mm | 9.8 ft | 33.9 oz | 5 mm | |
| 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 15x50 | 15x50 | 266 ft | 16.5 mm | 9.8 ft | 34.1 oz | 3.3 mm | Check price on Amazon |
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GPO binoculars
Passion HD 8.5x50 questions
Passion HD 8.5x50: does it work with glasses?
Passion HD 8.5x50 has 19.5 mm of eye relief, which meets the 16 mm the RSPB advises for people who wear glasses.
Passion HD 8.5x50: what does 8.5x50 mean?
Passion HD 8.5x50 magnifies 8.5 times through 50 mm front lenses, which works out to an exit pupil of 5.9 mm, the width of the beam of light that reaches each eye.