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The new, highly specified 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: | 8 x |
Minimum focusing distance (m): | 2 |
Objective lense diameter (mm): | 42 |
Eye relief (mm): | 17,8 |
Exit pupil (mm): | 5 |
Optical coatings: | Fully, multiple |
Focusing system: | Central focusing |
Glass material: | BaK-4 |
Field of view | |
Field of view at 1,000 m (m): | 129 |
Light intensity: | 27,56 |
True field of view (°) | 7,5 |
Twilight factor: | 18,33 |
Special features: | |
Eyepieces for spectacle wearers | Yes |
Protection bag | Yes |
Splash-proof | Yes |
Threaded tripod connector | Yes |
Nitrogen filled (fogproof): | Yes |
Dioptre adjustment: | Yes |
Waterproofness: | Yes |
General | |
Series: | Mistral |
Surface material | Rubber armouring |
Body material: | Synthetic material |
Weight (kg): | 0.684 |
Included accessories | |
Eyepiece cups: | Yes |
Area of application | |
Astronomy: | Medium |
Bird watching: | Very good |
Hiking | Good |
Hunting: | Very good |
Sailing: | Good |
Theater | Not recommended |
Traveling | Good |