Guide to High-Power Binoculars

Whether you are up for star hunting, or planetary observation, bird hunting, and sea watching, an excellent quality binocular is your best buddy. You can never go wrong and be disappointed with an ideal optic instrument that will make your adventure worthwhile and fantastic. So, it is always needed to secure that you purchase the quality item that suits your need.

When choosing high power binoculars, choose the one with the strongest magnification possible so that you’ll get clearer details of the things you observe from a much-extended distance, typically over 2 miles. Go for optics designed for long-distance viewings, such as binoculars with lens sizes that start with 10x, 20x, 30x, etc.

Why?A high magnification paired with a small objection lens size will give you a

decreased brightness of the image because the field of view gets smaller since the lens is smaller.



10×50, there are always two numbers that represent a piece of binoculars. The first number (10) is the power (or magnification), and the second (50) is the diameter of the lenses. Generally, binoculars’ power ranges between 8x to 20x, but if you spot a very distant subject across your land or a sailing boat 2 miles from shore, you should opt for 16x to 20x binoculars.

For example, you will use a Celestron – SkyMaster Giant 15×70 Binoculars. To determine its objective lens size divide the objection lens size by the magnification; the answer refers to the diameter of light in millimeters of the exit pupil.

The two numbers here are 15 and 70. Fifteen refers to its magnification, and 70 as its lens diameter. Divide 70 by 15, and it will give you 4.66… or converted to 4.7. This is an excellent binocular as it passes 3 as the good average diameter of light in millimeters of the exit pupil.



Although it is an exception when you have a pair of binoculars that do not follow this rule, as long as it features higher quality optics to increase brightness and image quality like ED glass, fully multi-coated lenses, and phase-corrected prisms.

The increase in weight and size is the only drawback to getting high power binoculars with a larger objection lens. This makes an ideal instrument for steady watching and not for hiking around with them all day.

Note: The Higher the Magnification of a binocular, the more difficult it is to hold steady. 16x magnification is the limit. Some people best pair their binoculars with monopod, bipod, or tripod, or have something where it can lean.

Where to Buy
Celestron - SkyMaster 25x70 Binocular - Large Aperture Binoculars with 70mm Objective Lens - 25x Magnificiation High Powered Binoculars - Includes Carrying Case
Celestron 20x80 SkyMaster Pro High Power Astronomy Binoculars
Vortex Optics Diamondback HD Binoculars
Nikon 8252 ACULON A211 10-22x50 Zoom Binocular (Black)
Bushnell PowerView 2 Binoculars
Celestron - SkyMaster Giant 15x70 Binoculars - Top Rated Astronomy Binoculars - Binoculars for Stargazing and Long Distance Viewing - Includes Tripod Adapter and Case


1. Celestron– SkyMaster 25×70 Binocular (Includes Carrying Case) 

Model Name: 71008

Color: Black

Material: Synthetic

Eye Relief: 13 Millimeters

This is a multi-coated optics for sharp, clear views and is suitable for terrestrial or astronomical viewing. It features a protective rubber covering for ultra-firm grip and a long eye relief ideal for eyeglass wearers.

2. Celestron20×80 SkyMaster Pro

Model Name: 4005660

Material: Synthetic

Water Resistance Level: Waterproof

Prism Description: Porro Prism

Its large 80 mm objective lenses are excellent for light gathering in low light conditions and astronomical observation activities. It features a detachable RSR rail so that you can attach an optional red dot finder scope. This binocular is rubber armored, making it user-friendly and daily protection from everyday use in the field.

3. Vortex Optics Diamondback

Material: Rubber

Focus Type: Center Focus

Objective Lens Diameter: 56 Millimeters

Lens Coating: Fully Multi-Coated

This binocular features an adjustable, twistable eyecup for comfortable viewing, whether with or without your eyeglasses. Its center focus wheel adjusts both binocular barrels at the same time. There is an adjustable diopter that is on the right eyepiece for differences in a user’s eyes. It also contains rubber for a non-slip grip, secure and durable external protection. An argon purging and o-ring seals serve as a water- and fog-proof performance in all environments.

4. Nikon 8252 ACULON A211

Model Name: 8252

Eye Relief: 8.6 Millimeters

Prism Description: Porro Prism

This Nikon 8252 binocular has an easy to reach fingertip zoom that allows quick adjustments of the magnification from 10 to 22 power with interpupillary distance adjustment from 56mm-72mm. It also contains a turn and slides rubber eyecups for comfortable viewing during extended periods of use. Its minimum focus distance is 49.2 feet /15 meters, and its exit pupil is 2.3 – 5 millimeters.

5. Bushnell PowerView

Model Name: Bushnell PowerView

Color: Grey

Material: Plastic

Objective Lens Diameter: 50 Millimeters

This binocular is made of aluminum alloy chassis, which guarantees durability without adding unnecessary weight and bulk. Besides excellent quality, it looked great with a modern design from its soft-touch rubber and brushed metal texture finishes. This binocular is also multi-coated optics that draw an incredible light for clear, vibrant images, even in low-light set-up and conditions.