Brunton Multi-Navigator Manual de Serviço descarregar pdf (Página 10)

Size and Weight?

If the binoculars are to be carried around for long periods of time, it is a good idea

to choose a compact model. The hiker will often nd a full size pair too bulky and

heavy, so they are often left at home. Lite-Tech™ Compact 8x25 and 10x25 are

excellent compact models, as they are waterproof and robust! If you prioritize

optical peak performance over lightweight, the choice would be Eterna™ Plus

7x42 or 10x42.

What is eye relief?

The ocular lens is the one through which the user sees the image in the binoculars.

Eye relief is the distance from the ocular lens to the user’s eye. The distance must

be correct, in order to see a complete, clear and sharp image. If you wear glasses,

you should choose a type of binoculars with eyepieces that can be pushed or folded

in, because glasses offset the distance of the eye to the lens. Eterna™ Plus and

Eterna™ Compact featuring fold-out/fold-in eyepieces

Do I need binoculars that are waterproof?

If the binoculars are going to be used in rain or in a marine environment it is

wise to choose a waterproof model. The same is true if the binoculars will be

subject to signicant changes in temperature. Waterproof binoculars (preferably

lled with nitrogen) keep out the surrounding air and its moisture and maintain a

stable and dry condition inside the binoculars. This prevents condensation. When

condensation dries out, it leaves droplet marks, which remain permanently inside

the lenses.

How much magnication do I need?

If the binoculars are going to be hand held and also used on moving platforms (eg

at sea) we recommend 7x or 8x magnication. The characteristics of 7x42 (Eterna™

Plus) are an excellent choice.

For outdoor use ashore it may be advantageous to choose more powerful

magnication, depending on what you need them for.

How important is it that the binoculars can be used under poor light

conditions?

A large exit pupil gives better light throughput and sharpness under difcult light

conditions. The type of optics also play a role.

Eterna™ Plus and Eterna™ Compact are excellent binoculars for use at dawn and

dusk.

How important is the price tag?

The optical quality of the binoculars matches the price. Bak-4 optics are more

expensive and complicated to produce than standard Bk-7 optics. It takes a lot of

work to produce good anti-reection coated lenses which also affects the price.

If your top priority is optical peak quality we recommend Eterna™ Plus and

Eterna™ Compact.

If you want to keep the price level down, but still get good and very price worthy

binoculars, you should take a closer look at the Lite-Tech™ series. If you need

small, light and easy to use binoculars, or an extra pair, Pocket should be your

choice.

Binoculars FAQ Binoculars FAQ

What do the numbers mean?

For example 7x42:

“7x” means that the object in view appears 7 times larger than when visualised

with the naked eye.

“42” is the size or diameter of the front (object) lens expressed in millimetres.

A larger diameter lets in more light and makes the binoculars better in poor light

conditions.

What kind of prism systems are there?

Traditional porro prism system and roof prism system.

Porro prism system binoculars let more light in and are larger and heavier and

therefore most popular in areas like boating, where brightness is of key importance

while the weight and form is not so important.

Roof prism system binoculars with their compact prism design are small and

lightweight and therefore popular for outdoor users.

Different glass qualities?

There are two types of glass quality: Bak-4 and Bk-7.

Bak-4 is extremely clean and transparent and is reportedly the best binocular

grade glass on the market. Bak-4 quality is achieved through a complicated and

time consuming manufacturing process.

Bk-7 is the standard quality for glass in binoculars. It is less expensive to

manufacture and therefore more popular for simple binoculars.

What is anti-reection coating?

Stray light inside the binoculars spoils the image.

In order to enhance the viewed image, coating is applied to the lenses and/or

prisms. It consists of a thin polarizing layer of magnesium uoride. Each layer of

stray light anti-reection coating gives a brighter and sharper image. Our patented

coating system Emerald Fire eliminates as much as 99.6% of the harmful UV- and

IR-radiation.

What is eld of view?

Field of view is the extent of the view you have through the glasses. Field of

view is expressed at a range of 1000 meters. The greater the magnication, the

narrower the eld of view. Higher magnication and narrower eld of view make

binoculars harder to hold still without support.

Eterna™ Compact with casing

Eterna™ Plus with casing

1 2 ... 5 6 7 8 9 10 11 12

Comentários a estes Manuais

Sem comentários

Brunton Multi-Navigator Manual de Serviço Página 10

Comentários a estes Manuais

Manuais e produtos relacionados com Sistemas de navegação Brunton Multi-Navigator