Delta Optical Extreme 10.5x70 ED Waterproof Binocular
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The Extreme 10.5x70 ED is a large observation binocular for those seeking uncompromising optical solutions. The latest optical technology supported by solid mechanics has been used in the construction of this powerful optical instrument and as a result, it performs very well and is extremely reliable. This model reveals an extremely big exit pupil of 6.7mm that is only possible at the combination of 70mm aperture and 10.5x magnification (calculated as 70mm/10.5=6.67mm)
The lenses that come with high quality anti-reflection coatings, Fully Multi Coated (FMC) lenses with a special ED glass element help to eliminate chromatic aberration that improves the overall sharpness of the image. A small amount of chromatic aberration is only visible at the very edge of the field of view.
Thanks to the above mentioned FMC coatings and the powerful, high quality prisms, there is no need to worry about vignetting or darkening of the image at the edge of the field of view. The FMC coating covers all optical elements of the binocular that results in over 90 percent light transmission through the system.
The 70mm aperture collects twice as much light as the lenses of a classic 50mm binocular.
The optical quality of the Extreme 10.5x70 is incomparable with the quality of cheap, popular binoculars with similar parameters. The image is extremely bright and sharp throughout the field; aberrations are practically absent and contours of objects are expressive, and let us observe minute details that are unobtainable in the lower class. It is designed for applications with more serious binoculars in mind and so its optical performance is being supported by excellent mechanics, too.
The Extreme 10.5x70 is very durable to extreme temperatures: it can be used between minus 40 degrees of cold and 70 degrees of heat! The robust casing is designed to withstand a certain level of shocks, small knocks and impacts during transportation and use, so you can take it with yourself on your heavy duty trips around the world...
The Delta Optical Extreme 10.5x70 ED is equally good for landscape observation, observation of birds, wildlife, ships, airplanes and general nature observation. Will provide good magnification while maintaining the fairly high-brightness of the image. Observers will also enjoy the comparatively wide-angle views, even wider than with the 15x70 version...
The Extreme 10.5x70 ED is commonly used for two purposes. First of all, this model is suitable for observation of poorly lit areas as a stationary equipment, so the Extreme 10.5x70 ED is being frequently used by naturalists, birders and hunters for observations at dawn, dusk or even under Moonlit landscapes while retaining very good image detail.
Second, this binocular is a great for astronomical observations. Well suited for observations of larger bright galaxies, such as M31 (Andromeda Galaxy), comets, some brighter nebulae, clusters and large portions of the Milky Way. Best to be used for hunting comets due to its lower magnification and increased brightness that allows observation of cometary tails under dark skies. The stars visible in the field of view will be pinpoint sharp and in the absence of chromatic aberration will retain their natural colours. Thanks to the presence of the FMC layers, glare around the Moon is barely visible and so observation of objects near to the Moon is possible.
Due to the size and weight of these binoculars we would recommend to use them with a tripod.
Warranty: 5 years
- Delta Optical Extreme 10.5x70ED
- Prism: BaK-4 porro
- Magnification: 10.5 x
- Lens diameter: 70 mm
- Minimum focus: 10 m
- Angular field of view: 5.0 degrees
- Linear field of view: 87/1000
- Focusing: individual
- Exit pupil: 6.67 mm
- Pupil distance: 23 mm
- Twilight factor: 27.11
- Relative brightness: 44.5
- Nitrogen filled: Yes
- Waterproof: Yes
- Coating of the metal body: special, high-quality rubber veneer
- Tripod adapter: Yes
- Case: hard case included
- Dimensions: 228x296 mm
- Weight: 2500 g