How to choose binoculars for astronomy?
Binoculars are in some ways more effective than telescopes when looking at the night sky. They are more portable, more intuitive to use, and offer a wider field of view. If you like astronomy, you should have a decent pair of binoculars. To help you solve this problem, I have created a short guide for beginners on how to choose binoculars for astronomy?
1. How to choose binoculars for astronomy?
Objective size: Stargazing with binoculars is easier and faster to set up than using a telescope. Set up astronomy with binoculars? Grab them, focus, and you’ll be ready. They’re easy to transport, and when using a standard wide-angle pair, you don’t need any tripods or stands — just your hands. Binoculars for stargazing should be at least 50mm, preferably 70mm and above. Larger lenses of 50mm to 100mm are very common in astronomical binoculars because they concentrate lighter.
Wide aperture: Large front lens. These collect a lot of light, so you can see fainter things. During the day, this doesn’t matter because there’s plenty of light and you can use a small front lens. Make daytime binoculars smaller, lighter and cheaper. But for telescopes, a bigger aperture is better.
Specular quality: Stars and faint celestial bodies seen against a dark sky are more demanding than daytime scenes, so mediocre lights show their flaws more clearly when you look at the night sky instead of eating pitchers’ mounds. In general, price is a good indicator of optical quality. The best optics do not come cheap.
Magnification: If binoculars are 10 x 50, that means they have 10 times power and a 50 mm objective. The secret to choosing the perfect night binoculars is to strike the right balance between magnification and lens size, resulting in clear, bright, and stable images. To avoid image jitter, you will need to purchase low-power binoculars (10x recommended) or use binoculars with a tripod.
The best all-around binoculars in astronomy are either 7×50 or 10×50. The 7×50 binoculars will give you a 7mm exit pupil, which is the maximum exit pupil you will want to use. The 10×50 binoculars have a 5mm exit pupil, which is even better. If you’re over 40, your maximum pupil dilation at night is probably closer to 5 millimeters. The smaller the exit pupil, the brighter the image, but your eyes must also be closer to the eyepiece, which can make it harder for some to use.
Field of view: The field of view is related to the width of the image. This is the width of the landscape you can see through binoculars. It is measured in degrees, and the larger the number, the wider the FOV. For astronomers, this means the amount of sky that can be captured by pointing binoculars at stars. The wider the view, the more sky you can cover. The wide view makes it easier to find your target. Powerful high-magnification binoculars typically have a narrow field of view,
Novice stargazers often ignore binoculars for astronomy, but seasoned observers keep them close at hand. Binoculars for astronomy actually have some advantages over telescopes. Of course, they’re smaller and less powerful. But they are lighter, easier to take out, use, and put away, and cheaper. They also provide a wider field of view than telescopes, making objects easier to spot. They allow you to use your eyes and provide a more reliable, natural view. 10×50 binoculars are great for stargazing, but can still be easily carried and used without a tripod. There will be no problem getting a stable image. These are also convenient for general viewing, travel, bird watching, hunting, sports, etc.