A general idea of brightness can be determined by exit pupil--dividing the magnification into the objective lens size. Thus, 8x42 binoculars have an exit pupil of 5.25 mm. And 10x42 binoculars have an exit pupil of 4.2 mm. Relative brightness is the square of exit pupil. 8x42 binoculars have a relative brightness of 27.5*. 10x42 binoculars have a relative brightness of 17.6. Really, that's only 5 inches difference. Not that much. Reviewers who have carefully measured the close focus distance have all discovered that the actual binoculars focus down to 7 feet or less--the rated number should be considered a maximum. 8 feet or less for close focus is good for these binoculars. On the other hand, the wider field of view means less eye relief--the distance between the ocular lens and your eye. If you wear eyeglasses the long eye relief feature comes into play. Eye relief should be greater than 16 millimeters if you wear eyeglasses to look through your binoculars.Eye relief of at least 19 millimeters makes viewing the entire field of view easy for nearly all eyeglass wearers, allowing us to see the full field of view. What's the difference between the model 5 and model 7 versions of the Nikon Monarch birding binoculars?

Lenses – Should have no marks on the elements andoptically clear. There may be light dust present that will not effect theimagery.

Our used products are subject to wear and tear in comparison to brand new products. This also applies to accessories that are supplied with the camera including batteries which may have a lower optimum performance level/life expectancy.

Extra-low dispersion (ED) glass for chromatic aberration compensation and brighter, clearer viewing

The impressive MONARCH M5 is just as suitable for high-energy hobbies, such as mountain climbing and hiking, as more relaxing activities like camping. All models are equipped with extralow dispersion (ED) glass which corrects chromatic aberration that causes colour fringing, offering a clear view, always. Specifications Actual magnification(x)

TOKYO - Nikon Vision Co., Ltd., (Nikon Vision), a subsidiary of Nikon Corporation (Nikon), is pleased to announce the release of a new binocular series, the MONARCH M5. These are the successor models to the MONARCH 5, which are the standard model of the MONARCH series that represents Nikon binoculars and has been highly acclaimed all over the world for many years.Bird watching binoculars are typically within the range of 7-10x magnification. Most birding binoculars today are 8x (8 power magnification). Dielectric high-reflective multilayer prism coating ensures superior transmittance uniformity across the visible range, resulting in brighter images and more natural colours Cameras – LCD screen is heavily worn either by de-lamination or has scratches to it. Rubber grips are starting to come away from the body. If you've been researching mid-priced binoculars you no doubt have the Nikon Monarchs on your list of best birding binoculars.