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Olympus Binocular 8x40 S - Ideal For Nature Observation, Wildlife, Birdwatching, Sports, Concerts , Black

£14.995£29.99Clearance
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Objective lens diameter – the measurement of the lenses at the end of the binoculars where light enters them (measured in millimetres). The larger the measurement, the more light the binoculars can take in, making the image appear brighter (all other factors being equal). Look through your binoculars at a plain scene, such as grass or sky, and move the central hinge until you see a single bright circular image. 2. Cover the right barrel

The focus wheel is smooth and precise (though in the pair I tested not quite as buttery smooth as my well used SF’s focus wheel). High performance And this, for me, is the magic of these new binoculars. I compared them side by side with my 8x42 SFs over a range of conditions and times of day, in April and May; and the difference between the pairs is minimal. Indeed, perhaps because I am so used to Zeiss binoculars, I needed no time to ‘adjust’ to using the 8x40 SFLs. Both pairs delivered wonderful, natural, ‘walk-in’ images we all expect these days from the best binoculars. These are the sort Advanced optical technologies including aspherical lenses plus coated lenses and prisms ensure a high level of optical performance by reducing image distortion and chromatic aberration for sharp images and a clear field of view with suberb transmittance.

I would not compromise the magnification or lens size in the correct ratio. However, waterproofing is equally important for anything I have done. What type of strap do you use and why? Best binoculars for astronomy: If you're planning on stargazing, we'd recommend a binocular size of around 7x50. The 7x magnification will work well for Astro viewing as a compromise between the field of view and magnification, while a 50mm lens will provide plenty of light transmission for spotting fainter celestial objects. large objective lens, collect more lights, deliver brighter view; bak4 prism and fmc are usually applied in professional binoculars, increasing light transmittance and providing good color reproduction. all of these provide premium image quality When out on the water, a rugged, waterproof design is essential. Low magnification will make it easier to see on a pitching boat. A magnification of 7x to 8x should do just fine. You will also want a larger objective lens. Look for an objective lens that is equal to or greater than 35mm. Suggested size: 7X50. Astronomy Field of View/Angle of View is the diameter of the circular viewing field. It is defined by the width in feet or meters of the area visible at a distance in yards or meters (usually 1000 yards in the USA). The angle of view is the maximum view you are capable of seeing through the binoculars expressed in degrees. You can easily convert from one measurement to the other by knowing that one angular degree is equivalent to 52.5 feet at 1000 yards. Multiply 52.5 by the angle of view to find the linear field of view. Or divide the linear field of view to get the angle of view.

That first number that generally follows the model name of a pair of binoculars refers to the magnification. For example, an 8x42 pair of bins provide eight times magnification, which makes things look eight times larger. A 10x42 pair offers 10 times magnification, and so on.If price isn't a concern and you just want the best optical quality on the market to date, then this pair of Swarovski CL Companion 8x30 compact binoculars are just the thing to let you observe wildlife from as close to 3 meters all the way up to 132 meters – with crystal clear vision.

These Olympus 8×40 S binoculars are the perfect companion for observing nature, sport, wildlife and bird watching. Magnification: 10x magnification will make your target appear 10 times closer, and so on – it’s as simple as that. With a field of view of up to 140 meters at a distance of 1,000 meters and a closest focusing distance of 1.5 meters, the SFL 8x40 deliver a perfect overview combined with precise detail recognition. turn-and-slide rubber eyecups - turn-and-slide rubber eyecups allow users to adjust the eye-relief for a custom fit-providing a full field of view and maximum comfort during extended periods of use. The convenient proportion between objective aperture and magnification makes observations during dawn phasespossible. Diopter adjustmentand foldable rubberized eyecupsare included. The handy and touch-proofed surface of the BRESSER Hunter 8x40provides a comfortable grip. The tripod connectionis standardized for these models.Twilight factor is computed by multiplying the objective lens diameter by the magnification and then taking the square root of this product. Thus an 8x42mm binocular has a product of 336 (8x42=336). The square root of this is 18.33 (√336=18.33). This number may seem reasonable when comparing an 8x42 pair of binoculars with a twilight factor of 18.33 with an 8x25 pair with a twilight factor of 14.14. The twilight factor really only comes to play when looking for binoculars to use during twilight or for astronomy. Again, this formula also doesn't consider the optical quality that has a tremendous impact on the perceived brightness of the optics. Some of our panel preferred lighter, more compact binoculars, and others liked weightier, more substantial pairs. Waterproofing and durability With a durable, high-quality finish resisting any nature conditions and a rubber coated grip ensuring a safe hold these binoculars are well equipped for outdoor use. Objective lenses of 28mm are generally considered compact. Bins of this size often weigh well under a pound. However, you often make significant low-light performance sacrifices when moving to a lens of this size, meaning poor lighting conditions can result in silhouetted images with very little color detail. Variable-speed focus allows rapid turning of the knob to yield coarse adjustment, while slow turning yields fine adjustment. This system works very well but takes time to get used to. The use of two separate focusing knobs, one for coarse and one for fine focusing, can also be used, though uncommon.

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