Are you after the best budget binoculars for the total solar eclipse that is coming up this summer? If you've ever seen a solar eclipse, you will know how fiddly solar eclipse glasses can be.
Sure, protecting your eyes from dangerous infrared light, UV light, and bright sunlight is imperative while looking at the sun. However, simple solar eclipse glasses get easily damaged, and they obviously don't offer any magnification.
Cue solar binoculars, which have built-in solar filters on their objective lenses to allow in only safe levels of sunlight so you can observe the sun directly and magnified to a size where you can see it in more detail.
On August 12 this year, parts of Spain, Portugal, Greenland, and Iceland will be able to witness the 'once in a generation' spectacle of a total solar eclipse – the last in continental Europe was back in 1999. But there won't be such a long wait for the next one, which will be visible on August 2, 2027, from countries including Spain, Gibraltar, Morocco, Algeria, Tunisia, and Egypt.
With Lunt having discontinued its SUNoculars range, Celestron is now the only real choice for those who want a safe way to get a magnified view of the sun, without investing in a telescope or a telephoto camera lens, both of which will need to be fitted with a solar filter.
Happily, the products available cover all kinds of magnifications, from portable and pocket-sized 10x25 binoculars (that’s 10x magnification and 25mm aperture objective lenses) to heavier, more powerful 20x50 binoculars.
Within the small range available, you’ll find both roof prism (for small, portable binoculars) and Porro prism (for large yet affordable) designs. Crucially, the solar filters used all conform to the ISO 12312-2:2015(E) international safety standard.
Although solar binoculars make it safe to view the sun, it pays to know an extra safety technique. After all, when bringing solar binoculars up to your face, it’s all too easy to look at the sun – and that goes double if you have problems locating it through the otherwise very dark optics. A good technique here is to wear a wide-brimmed hat, which will instantly block the sun from getting in your eyes while you find the sun and adjust the binoculars.
Jamie is the editor of WhenIsTheNextEclipse.com, and travels the world watching every eclipse he can. He has personally tested all the solar binoculars in this guide.
The best solar eclipse binoculars
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Best value
Light enough to hold steady while also offering decent magnification, these binoculars are excellent for watching the progress of an eclipse while also being good for studying the surface of the sun.
Low-priced and with just the right amount of magnification for stunning close-ups of sunspots while also being easy to hold steady, the Celestron EclipSmart 10x42mm offers the perfect balance for those wanting something impressive without being too big and bulky. Crucially, it’s easy to find and focus on the sun, with a nice, bright, and sharp view, although we did notice both a blue and yellow line around the limb, telltale signs of color fringing.
Although it’s the most impressive of Celestron’s three Porro prism binoculars in its EclipseSmart range – including a slightly better build quality – the Celestron EclipSmart 10x42mm has a lot in common with both the 12x50 and 20x50 models, both good and bad.
All have thumb pads underneath the barrels that make it easy to grip and offer plenty of eye relief. However, the shoulder case included is of very basic quality, as is the neck strap, while the separate lens caps on both the lens caps and eyecups are easy to lose. What this model does lack is an adaptor for attaching a tripod, though that’s something that simply isn’t required at this easy-to-handhold 10x magnification.
Best portable
If you just want to keep track of the progress of the moon across the sun during an eclipse and you’re not interested in seeing sunspots, then the Celestron EclipSmart 10x25mm roof solar binoculars are for you.
A tiny pair of binoculars not much bigger than the footprint of a smartphone, these roof prism binoculars offer 10x magnification, but only 25mm objective lenses. That means a small bluish-white image of the sun that lacks brightness, though the wide-angle of view makes it very easy to locate the sun quickly. In my test, I could just about see some sunspots, though not nearly as many – and not as clearly – as larger, higher magnification, brighter solar eclipse binoculars.
It’s a no-frills package, with a simple string for a neck strap, but since they’re so lightweight, the Celestron EclipSmart 10x25mm roof solar binoculars can hang effortlessly around the neck during an eclipse. Also in the box is a pouch that has a belt loop, but they can just as easily live in a pocket. The only real downside to these travel-friendly solar binoculars is the lack of eye relief.
Best for tripods
Many people find binoculars that magnify 10x or higher quite difficult to hold steady, and that certainly applies here. Although almost identical to the 10x42 and 12x50 Celestron models, this 20x50 binocular is just too heavy to hold for longer periods of time.
What’s more, the narrow field of view makes it very hard to quickly find the sun. This is why the tripod jack between the barrels of this Porro prism binocular is so useful. When held steady on a tripod, the Celestron EclipSmart 20x50 offers fabulous close-ups of sunspots on the surface of the sun amid a blueish-white view of the solar surface. I also didn’t notice many traces of blue and yellow color fringing around the sun.
Impressive when mounted on a tripod, the Celestron EclipSmart 20x50 is best thought of as a travel-friendly alternative to taking a small telescope to see an eclipse rather than as solar binoculars for hand-holding.
As with the others in the range, the Celestron EclipSmart 20x50 comes with thumb pads underneath the barrels and lots of eye relief, but with loose lens caps, a thin neck strap, and a basic shoulder case.
Best high-magnification
If you want as much magnification as possible for finding sunspots on the solar surface, then the Celestron EclipSmart 12x50 is a tempting proposition. With 12x magnification and solar filters permanently attached to its 50mm objective lenses, these Porro prism binoculars offer a bright, blueish-white view of the sun with only a trace of blue and yellow color fringing.
It’s easily possible to find sunspots and even split sunspots in dense areas of activity, but there are some caveats. The main issue is that while it is possible to hold the Celestron EclipSmart 12x50 in the hand to use at an eclipse (or just for sunspot viewing), it’s a wobbly affair.
The weight of these binoculars is such that it’s better to mount them on a tripod (using the built-in tripod jack and an L-shaped binocular adaptor) or, at the very least, sit on a reclining chair when you use them.
By using either a tripod or yourself to support some of the weight, it becomes easier to keep them steady. That’s if you can find the sun with them, something that takes a little practice at this magnification – it’s certainly something you should master before eclipse day.
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