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Helios MISTRAL WP6 roof prism range comprises ten models over 32mm, 42mm and 50mm objective lens apertures. They are extremely competent instruments for both birdwatching & general observing and represent truly amazing value. They feature a very stylish, ergonomic, modern top hinge design covered in sleek green rubber armouring. The body is constructed from lightweight but robust polycarbonate.
All models feature high-index, silver-coated BaK-4 prisms and fully multi-coated optics which provide excellent optical performance. Images delivered are crisp and sharp, with very good resolution, brightness and depth of field, whilst maintaining colours to a natural level. Near focus capability of all models is 2.5m or less. Waterproof (30 minutes at 1M depth) and nitrogen filled for clear, fog-free operation. Twist-up, 3–position eyecups with metal sub-structure. Suitable for spectacle wearers. Knurled metal, easy-grip 2-turn focusing knob. Integral tripod bush. Supplied with neck strap, eyepiece rainguard, objective lens caps and soft case.
NOTE: The premium 8x42ED, 10x42ED & 10x50ED models incorporate exotic Extra-low Dispersion (ED) glass in their construction for enhanced colour fidelity and also have the additional benefit of phase-coated prisms for enhanced light transmission and image contrast.
| Optical characteristics | |
|---|---|
| Type of build: | Roof |
| Magnification: | 10 x |
| Minimum focusing distance (m): | 2 |
| Objective lense diameter (mm): | 17.8 |
| Optical coatings: | Fully, multiple |
| Glass material: | BaK-4 |
| Field of view | |
| Field of view at 1,000 m (m): | 103 |
| Field of view (degrees): | 5.9 |
| Special features: | |
| Waterproofness: | Yes |
| General | |
| Weight (kg): | 0.795 |
| Warranty: | 2 years |
| Included accessories | |
| Carrying bag: | Yes |
| Protective lens caps: | Yes |
| Neck strap: | Yes |
| Area of application | |
| Astronomy: | Good |
| Bird watching: | Very good |
| Hunting: | Very good |
