Multi Coated Optics - Multiple layers of coatings on all lens surfaces increase light transmission and image brightness.

Yes, Procular ships throughout the UK, EU, USA, Australia, New Zealand, Canada and to over 200 countries worldwide. International delivery time is approximately 7 to 14 business days. Our friendly team will be happy to discuss all of your hollow section requirements, so why not give us a call today on 0800 123 70 10 for advice and to get our latest prices. alternatively, drop us a line at: [email protected] Generally available in 7.500 to 7.650 Metre lengths in Grade 43; however other lengths and grades are available. For your information Kg/m refers to the Kilograms per Metre of the section, as an example a 4.200 Metre length of 48.3 OD x 3.2mm (CHS) Circular Steel Hollow Section (3.56 Kg/m) would weigh (4.2 x 3.56) 14.952 Kg's Total. 21.3 OD x 3.2mm (CHS) Circular Steel Hollow Section (1.43 Kg/m)As you shop for binoculars, you’ll see that each pair has a spec listed in this number x number formula. The first number in this equation indicates the magnification power that the optics provide. The second number indicates the objective lens diameter for the binoculars. These numbers, taken individually or together, can tell you a lot about the viewing quality of that particular model. Magnification Viewing through UpClose G2 is comfortable for eyeglass wearers and non-eyeglass wearers alike, thanks to its rubber eyecups. Keep the eyecups up for proper positioning of the eyes without glasses. If you are wearing glasses, simply fold them down and out of the way. UpClose G2 also contains other optical surfaces treated with special coatings to boost light transmission even more. The result is a brighter view than uncoated binoculars.

Not compatible with #93648 Off-Axis Guider, not compatible with #93519 2" Mirror Diagonal (discontinued) Metal Supplies™ have been supplying the UK building and construction industry with all types of structural steel for many years, including a wide range of Mild Steel Steel Hollow Sections: square, rectangular and circular. Of course, larger lenses will also mean more bulk and weight are added to the binoculars. A pair of binoculars with 50mm object lenses will gather a decent amount of light photons, but will be larger and heavier. Seeing It All Together UpClose G2 is tripod-adaptable, so you can mount it on any standard photographic tripod for extended viewing or digiscoping (photography through the eyepiece). The tripod adapter is sold separately. With the detachable objective lens caps you’ll be able to keep your lenses protected at all times. Plus, the large, smooth focus wheel is easy to turn allowing you to focus on subjects at varying distances even with gloves on. Generally available in 7.500 to 7.650 Metre lengths in Grade 43; however other lengths and grades are available. For your information Kg/m refers to the Kilograms per Metre of the section, as an example a 4.200 Metre length of 50 x 30 x 3mm (RHS) Rectangular Steel Hollow Section (3.45 Kg/m) would weigh (4.2 x 3.45) 14.49 Kg’s Total.Inside the UpClose G2 are two Porro prisms, reflective optical prisms that the form of a right-angle triangle with two sides of equal length. Porro prisms make binoculars more compact without compromising focal length or the dispersion of the light rays as they pass through it giving the classic “broad-shoulder” shape of a traditional binocular. Our Porro prisms are constructed of BK-7 optical glass, which provide high reflectivity so that more light passes through the optical path to your eye.

Keep in mind that the more an image is magnified, the harder it will be to keep that image steady. Many users find a magnification of 8 or 10 to be the highest that they can keep steady with their hands before a tripod or another type of platform is needed. A pair of binoculars with 20 times magnification would likely benefit from a tripod. Objective Lens Diameter

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x 70 = very nearly as bright as the 10 x 50, and will show more detail. But only some people will be able to hand hold these due to the high level of magnification and the weight. A pair of 20×50 binoculars will magnify 20 times and employ objective lenses of 50mm diameter. These binoculars will provide an exit pupil of 2.5mm (objective lens divided by magnification). An exit pupil of this size provides plenty of daylight power with decent cloudy or late-afternoon visibility. You might want to add a tripod for stability, however. The listed magnification power (the first number in the formula) indicates how many times larger an image appears through the ocular lenses than it does with an unaided eye. In the case of the formula 20×50, a pair of binoculars with this magnification would produce an image that is 20 times larger than what you would see with your eyes alone. Looking to buy postal boxes wholesale? If you buy in bulk from us you can take advantage of our amazing discounts. A binocular’s objective lens diameter (listed in millimeters) shows the width of the front lenses (the side closest to the object being viewed). These lenses are used to gather light photons. Our eyes use light photons to see. As an objective lens gathers light, it provides a clearer, sharper image. The wider the lens, the more light that can be gathered.