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8X21 Binoculars For Bird Watching

8X21 Binoculars For Bird Watching

8x21 binoculars for bird watching refer to a specific type of binoculars with a magnification power of 8x and an objective lens diameter of 21mm.
The magnification power of 8x means that the binoculars will make objects appear eight times closer than they would to the naked eye.
The objective lens diameter of 21mm indicates the size of the front lenses of the binoculars.

Product Introduction
Specification

 

 

BM-4072

Model Number

8X21

Magnification

8X

Objective Diameter(mm)

21mm

Exit Pupil Diameter(mm)

2mm

Exit Pupil Distance(mm)

9.1mm

Prism System

Roof

Close Focal Length(m)

5m

Type of Prism

BK7

Lens Coating

MC

Unit Dimension

11.3x4.5x11.7cm

Weight(g)

253g

 

Why do we choose 8X21 Binoculars for Bird Watching

 

1.Portability:

8x21 binoculars are compact and lightweight, making them easy to carry during bird watching expeditions. They are often designed to be foldable and can fit into a pocket or a small bag, allowing for convenient transportation.

 

2.Wide field of view:

Binoculars with smaller objective lens diameters, such as 21mm, tend to have wider fields of view. A wider field of view allows you to scan larger areas of the sky or landscape, making it easier to locate and track birds as they move.

 

3.Good balance of magnification:

An 8x magnification provides a good balance between bringing birds closer for observation and maintaining a stable image. Higher magnifications may amplify hand movements and make it harder to keep the image steady, especially without a tripod

 

How to choose a good 8X21 Binoculars For Bird Watching ?

 

1.Optical quality:

Look for binoculars with high-quality optics that provide clear and sharp images. Check for features like multi-coated lenses, which enhance light transmission and reduce glare. It's also important to consider the quality of the prisms used in the binoculars, as they affect image brightness and clarity.

 

2.Size and weight:

Since portability is often a priority for bird watchers, choose binoculars that are lightweight and compact. This will make them easier to carry and use for extended periods without causing strain or fatigue.

 

3.Durability and build quality:

Bird watching often involves outdoor activities and sometimes challenging environments. Opt for binoculars that are built to withstand rugged conditions. Look for features such as rubber armor or waterproofing to protect the binoculars from impacts, moisture, and dust.

 

 

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