The new, highly specified Helios MISTRAL WP6 Roof Prism Binocular range comprises 50mm objective lens apertures. They are extremely competent instruments for both birdwatching and 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 and nitrogen filled for clear, fog-free operation. Twist-up, 3–position eye cups with metal sub-structure. Suitable for spectacle wearers. Knurled metal, easy-grip 2-turn focusing knob. Integral tripod bush. Supplied with neck strap, eyepiece rain guard, objective lens caps and soft case.