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The best star trackers for astrophotography have changed the scene forever by being able to counteract the rotation of our planet. It was only until a few years ago that a long exposure of more than about ten seconds caused stars to look like little streaks or blurs in your photos. That made it very difficult to extract much data from deep-sky objects such as nebulae but also from the Milky Way. Cue the invention of the star-tracker — in simple terms, it is a shrunken equatorial mount but designed for cameras instead of telescopes.
Like an equatorial mount, a star tracker needs to be aligned (often with the help of a smartphone app) with the north celestial pole (the star Polaris) in the northern hemisphere or the south celestial pole in the southern hemisphere. It then moves at a pace to keep your camera in sync with Earth’s rotation. That way it counteracts the rotation of the Earth and keeps the target object still in a composition, thus allowing blur-free long exposures.
Of course, you’ll need one of the best cameras for astrophotography equipped with one of the best lenses for astrophotography to get the best possible astro images. If you’d rather have a more generalist camera, discover our guide to the best cameras for photos and videos and either the best tripods or travel tripods to keep things steady.
Best star trackers for astrophotography deal April 2023
The best star trackers for astrophotography 2023
The best star trackers for astrophotography 2023 ranked
While most star trackers are a compromise between their own weight and their payload, the Benro Polaris is an exception — it is both super lightweight (at 3.3lbs / 1.5kg) and super-supportive, taking a mighty 15lbs/7kg of gear (the highest carrying capacity of any star tracker mount so far).
It achieves the best star tracking results by using precise high torque motors and it has a waterproof IPX6 rating. It is also the first star tracker to offer built-in DSLR control which allows you to adjust the composition of your photo remotely, and a built-in micro SD card slot. Remarkably, the Benro Polaris can even be controlled via the cellphone network.
Its huge 2500 mAh battery can be recharged via USB-C while alignment is via any subject from a choice presented on a smartphone app. However advanced the best star trackers appear, there’s evidence from this electric tripod head that their days are numbered. All of this top-quality tech does come at a high price though, sitting around $1200.
- As well as producing one of the best star trackers, Benro also produces some of the Best tripods
The priciest yet one of the best star trackers around for astrophotographers is the iOptron SkyGuider Pro. Many star trackers are made for landscape photographers wanting to save on weight when out in the field searching for wide-angle compositions that include the night sky. But there are plenty of astrophotographers that only want to use telephoto lenses to capture light from distant deep sky objects. That means bigger payloads and longer exposures, which is what the iOptron SkyGuider Pro is designed for.
Able to take about 11lbs / 5kg, it can support long lenses or even a small telescope, making this a product that in some ways behaves more like a motorized equatorial mount, though its wedge lacks a little precision. Another downside is its use of a counterweight to reach that higher capacity than average, which adds a further 3lbs/1.35kg to the product (and therefore your camera bag).
Aligning using its electronic polar finderscope and iOptron Polar Scope app is simple, and like most of its rivals it also tracks the Sun, Moon and allows 1/2-speed motion time lapses at night.
The incessant creep of light pollution means it’s now almost inevitable that you’ll need to travel to find the darkest night skies possible. Even if you don’t travel internationally, finding dark skies often means hiking into backcountry areas away from other humans. That necessitates a star tracker that strikes the right balance between its own weight (because you’ll need to carry it) and what it can support.
Cue the Sky-Watcher Star Adventurer Mini, affectionately known as SAM, which can take a payload of 3kg yet it is relatively easy to squeeze into a camera bag. It’s not the sleekest device ever, and nor is its SA Console app up to much. However, as we found during our Sky-Watcher Star Adventurer Mini review, once you get used to its minor niggles, SAM is reliable and relatively easy to use. It’s possible to get accurate long-exposure images of up to about four minutes, which makes SAM a great choice when you’re limited on weight and budget. Accessories include a counterweight and declination bracket to increase the payload.
While iOptron’s SkyGuider Pro is aimed at deep sky photography, the pared-down, and more compact iOptron SkyTracker Pro is aimed more at wide-angle nightscapes. Its payload capacity, at 6.6lbs/3kg, is much less than its stablemate and at 2.5lbs/1.1kg it is also lighter. As such it’s more suitable for those wanting to carry a star tracker in their camera bag during trips and travel.
It has a wider appeal than just nightscapes — in addition to tracking objects in the night sky, it can also follow the Sun and Moon and it has a half speed for capturing time-lapses. As a bonus, its internal battery can run for 24 hours.
It sits at an affordable price point, and the supplied accessories include a counterweight and declination bracket to increase the payload.
Even smaller and nimble than the SAM is the excellent value Move Shoot Move, a star tracker suitable only for wide-angle lenses. That’s partly because of its limited payload of 6.6lbs / 3kg and partly, as we discovered in our Move Shoot Move star tracker review, because it’s just not the most accurate star tracker around.
While that might sound like a deal-breaker, it’s a plus if you only intend to take wide-angle images of the Milky Way and starfields. For such photos a rough alignment with Polaris is all you need, something that can be done easily and quickly using an included green laser pointer.
The Move Shoot Move isn’t going to accurately track Polaris for more than two or three minutes (though the wider and lighter your lens you use, the longer it will remain accurate). But none of that will matter much if you have a reasonably fast wide-angle lens. If you have a telephoto lens though, look elsewhere.
In the world of star trackers, there’s always a trade-off between size and versatility, and the Polarie compact size means it can support a payload of just 2kg. Therefore, it is best used with not only wide-angle lenses but fairly lightweight models — using a mirrorless camera body will give you more flexibility.
Alignment is via a supplied compass, a built-in latitude meter and a polar sight hole, so you will have to know how to find Polaris and/or the south celestial pole. On hand to help are both red light illumination and the Vixen PF-L Assist app for smartphones, and you can have a look at our handy guide too.
As well as long exposure astrophotography the Polarie can track the Moon and the Sun (the latter useful for solar eclipses) and its half-speed allows motion time-lapses at night.
Its short two-hour battery life can be augmented by instead attaching a power bank to its micro USB slot. Optional accessories include a counterweight to boost the payload to 6.5kg, a polar axis scope and a time-lapse adapter.
Best star trackers for astrophotography 2023: What to look for
Star trackers — that sit between a tripod and a camera — are not all the same. They have varying weights and designs but also manage different payloads (the weight of your kit). While some are ideal for telephoto lenses pointed at specific targets, others can only handle shorter wide-angle lenses, often used for capturing the Milky Way in all its glory. Both the maximum payload and the accuracy of star trackers vary. They are often fiddly and time-consuming, but at their best, star trackers can deliver addictively good images.
As well as weighing your camera body and lens before making a purchase, do remember to take into account the added weight of a couple of ball-head mounts and the load-bearing ability of your tripod. If in doubt, go for bigger capacity mounts because as a rule of thumb it’s best to have your rig’s total weight about half the capacity of the mount.
How we test the best star trackers for astrophotography
To guarantee you’re getting honest, up-to-date recommendations on the best star trackers for astrophotography to buy here at Space.com we make sure to put every star tracker through a rigorous review to fully test each instrument. Each star tracker is reviewed based on a multitude of aspects, from its construction and design, to how well it functions as an imaging instrument and its performance in the field.
Each star tracker is carefully tested by expert staff or knowledgeable freelance contributors who know their subject areas in depth. This ensures fair reviewing is backed by personal, hands-on experience with each star tracker and is judged based on its price point, class and destined use.
We look at how easy it is to set up, whether the star tracker mounts are reliable and quiet, if a star tracker comes with appropriate accessories and also make suggestions if a particular star tracker would benefit from any additional kit to give you the best astrophotography experience possible.
With complete editorial independence, Space.com are here to ensure you get the best buying advice on telescopes, whether you should purchase an instrument or not, making our buying guides and reviews reliable and transparent.
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