The Opticron Trailfinder HD 10x36 is a compact roof prism monocular with 10x magnification, a 36mm objective lens and fully multi-coated optics. Held one-handed on a walk or hike, the 288g aluminium body keeps weight low, while BAK4 prisms and the 36mm lens transmit ample light for shaded woodland, overcast fields and quick wildlife checks without carrying full binoculars.
Opticron Trailfinder HD 10x36 Roof Prism Monocular Key Features:
- 10x magnification gives steady single-eye viewing for countryside observation
- 36mm objective lens gathers light for shaded and overcast conditions
- Fully multi-coated optics reduce reflections and maintain image contrast
- BAK4 roof prisms provide excellent edge clarity across the 6.2° view
- 108m field of view at 1000m keeps scanning comfortable
- 17mm eye relief allows glasses wearers a full field of view
- The three-stage twist eyecup sets eye position comfortably and blocks stray light
- 5.3m close focus suits general countryside and wildlife observation
- Aluminium alloy body keeps weight pared down to 288g
- PR rubber armour gives grip and light impact protection
- Nitrogen-filled body resists internal fogging during temperature changes
- IPX-6 waterproof rating protects against heavy rain and extended water exposure
- The monocular features an integrated belt clip for easy portability
FAQs:
Is the Opticron Trailfinder HD 10x36 waterproof?
Yes. The Trailfinder HD 10x36 is nitrogen-filled and rated to IPX-6, so the housing resists heavy rain and water exposure. Nitrogen filling prevents internal fogging when the monocular transitions between warm and cold conditions, such as when stepping out of a car into damp air or moving through shaded woodland. The rubber armouring also gives your hand extra grip when the scope body is wet.
Is it suitable for spectacle wearers?
Yes. The 17mm eye relief provides enough distance between your eye and the eyepiece to see the full field of view while wearing glasses. The three-stage retractable rubber eyecup lets you adjust the eyepiece height in small steps. When the eyecup sits at the right height, your eye lines up more naturally with the optical path.
How wide is the field of view?
The field of view is 108m at 1000m, which equals 6.2°. This is narrower than lower-magnification viewing, but it suits the 10x design because the monocular is geared towards distant detail. The field still gives enough surrounding context to follow slower wildlife movement or scan across ridgelines. Holding the 288g body one-handed allows for quick viewing on walks.
What is the minimum focus distance?
The Trailfinder HD 10x36 focuses down to 5.3m. That distance suits general countryside viewing, such as birds, signs, livestock, distant paths, or landscape details. It is not a close-range macro-style monocular. Instead, it keeps the focus range practical for outdoor observation, where subjects usually sit at moderate or longer distances.
How does this set of binoculars compare to the 8x36 version?
The 10x36 offers greater magnification than an 8x model, so distant subjects appear larger in the field of view. That extra reach is ideal for wildlife, ridgelines or coastal detail where the subject is farther away. The trade-off is a narrower 6.2° field of view, which favours detail over wider scanning. Users who prioritise reach over the widest view will get the most from this configuration.
Product Specification
| Exit Pupil [mm] | 3.6 |
| Eye Relief [mm] | 17.0 |
| Eyepiece Construction | 3-stage twist eyecups, 20 mm eyelens diameter |
| Field Of View, Apparent [degrees] | 62 |
| Field Of View At 1000m [m] | 108 |
| Field Of View, Real [degrees] | 6.2 |
| Fog Proof | Yes, nitrogen-filled |
| Image Stabilisation | No |
| Magnification [x] | 10 |
| Minimum Focus Distance [m] | 5.30 |
| Objective Lens Diameter [mm] | 36 |
| Optical Coating | Fully multi-coated lenses and multi prism coating |
| Prism Type | Roof Prism |
| Relative Brightness | 12.96 |
| Size [mm] | 125 x 56 x 49 mm |
| Twilight Number | 1897 |
| Type | Monocular |
| Waterproof | Yes |
| Weather Protection | Waterproof and nitrogen-filled |
| Weight [g] | 288.00 |