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The Extreme 15×70 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 BA8 design optical instrument and as a result, it performs very well and is extremely reliable. The highly respected Allbinos/Optyczne review website give it an almost identical review score to the much more expensive Fujinon FMT-SX 16×70, on which its design is based. These brand new binoculars have been fully tested in the UK for optics, mechanics and construction, prior to courier despatch.
The lenses that come with high quality anti-reflection coatings, Fully Multi Coated (FMC) lenses with a special ED glass element (unlike the otherwise very similar Helios Apollo) 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 15×70 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 15×70 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 knocks, shocks and impacts during transportation and use. So don’t be afraid, take with yourself on your trips all around the world.
Due to the size, weight and high magnification of these binoculars we would recommend to use them on a tripod, although they can be comfortably hand held for several minutes at a time. Tripod adapter is included.
The Delta Optical Extreme 15×70 ED is equally good for landscape observation, observation of birds, wildlife, astronomy, 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.
The Extreme 15×70 ED is also an ideal instrument for observation of aircraft at high altitudes. The high level of image detail will help to easily recognize the type of machine and the airline.
First and foremost, however, this binocular is a great piece of equipment for astronomical observations. Perfectly suited for observations of bright nebulae, comets, clusters, galaxies and large portions of the Milky Way. 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. They are widely recognised as the best value serious astronomical binoculars and now at the lowest price currently available in the UK.
Warranty: 5 years
Delta Optical Extreme 15x70ED
Prism: BaK-4 porro
Magnification: 15 x
Lens diameter: 70 mm
Minimum focus: 10 m
Angular field of view: 4.4 degrees
Linear field of view: 77/1000
Focusing: individual
Exit pupil: 4.67 mm
Pupil distance: 18 mm
Twilight factor: 21.8
Relative brightness: 32.4
Nitrogen filled: Yes
Waterproof: Yes
Coating of the metal body: special, high-quality rubber veneer
Tripod adapter: Yes
Case: hard case included
Dimensions: 228×280 mm
Weight: 2550 g
Category: Cameras and Photography:Telescopes and Binoculars:Binoculars and Monoculars
Location: Harpenden, Hertfordshire
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