What are zoom binoculars?
Zoom binoculars have continual magnification and are categorized by their range of magnification. Therefore the 10-120×80 have a variant that is between 10 – 120. The range can be zoomed in by the user adjusting the zoom lever; likewise the range can also be zoomed out.
Binoculars that have a single magnification are known as fixed power and these are easily recognized as they have just one magnification number such as 8×40. There are binoculars that have multiple magnifications but no zoom facility and these are distinguished with the slash that is used in addition to the numbers such as 10/40×100. The various magnifications such as 10x and 40x are created by switching different pairs of eyepieces.
Many people have quality zoom lenses on their cameras so it is understandable that this is a feature that some may want to take advantage of with their binoculars, however it is not as easy as it may at first seem.
Binoculars already have two independent telescopes that are connected; therefore the binoculars must be able to synchronize the zoom mechanism between both of the telescopes. The only way this can be achieved is by using a flexible metal band that connects the zoom mechanism on the right to the one on the left. Each of the moving parts has a certain amount of give which is unavoidable. This is why one of the two telescopes will always lead and the other lag slightly. The result of this is that the two telescopes never have the exact same magnification.
The 10-120×80 zoomable brand outdoor sport telescope binoculars offer some beneficial features which include:
- HD BAK 7 Prism material
- Field of view that is 7.8 degrees
- Range of at least 234 ft
- Compact dimensions of 181mm x 186mm x 63mm
Points to consider
From the features alone it is fair to assume that these long range binoculars have a number of uses. Apart from the obvious issues that the zoom feature can cause, infrared binoculars or more specific zoom binoculars will never provide a performance that is as good as that of fixed power binoculars of a similar size and price point.
When using high power these infrared binoculars return an image quality that is degraded and poorly combined. Users also need to consider as magnification becomes increased the compact binoculars become more difficult to hold. Rule of thumb that highest magnification that can be used without a mount is x15, so this pair of long range binoculars do not fall within these limits however the use of a mount is probably advisable in order to guarantee useable view.
Fixed power infrared binoculars that are comparable will offer identical magnification and can be held; they will provide better image quality and not suffer with the problems that are unique to the zoom binoculars.
So, if you really want variable magnification it could be worth considering a binocular that has the ability to use various eye pieces to obtain the different magnification variants.
Whilst the outdoor sports binoculars are not without faults they do offer enough benefits to make them more worthy of consideration such as:
- Casing that is non slip rubber which absorbs shock, provides durability and gives users a good firm grip
- Large central focus knob which allows for precise adjustments
- Include a sturdy carry case which gives ease of transportation without the worry of damage
The outdoor sports binoculars make an ideal way to view many activities which include being one of the best binoculars for bird watching, great long range binoculars for sporting events and concerts and also an excellent choice of compact binoculars for travelling, fishing and camping.