Seasoned astrophotographers may miss the cast metal fixtures, but the SkyTracker Pro doesn't suffer without them.Ī much more basic version than the brand’s souped-up iOptron SkyGuider Pro (featured below), the SkyTracker Pro’s built-in battery lasts for 24 hours, though it can be recharged via an external battery via micro USB. What's more, and over the older generation of SkyTracker, we have to say that the feel of the Pro has drastically improved – despite iOptron switching out the metal components, we are left with a set up that doesn't feel that it's going to fall apart during observations: everything is welded beautifully together. If you’re restricted on the weight of your camera bag, but need a long battery life, look no further than the iOptron SkyTracker Pro. That’s so useful because long exposures of two minutes or more are necessary to capture enough light, color, and detail to properly reveal the Milky Way, as well as faint celestial sights such as star fields, galaxies, nebulae, and even gas clouds. So what do you do if you want to shoot the night sky with long shutter speeds over 30 seconds – and as long as four or five minutes? Cue a rotating star tracker, a device you place between camera and tripod, which when aligned with the north celestial pole (if you’re in the Northern Hemisphere) or the south celestial pole (if you’re in the Southern Hemisphere) will keep your camera in sync with Earth’s rotation.
The ultimate proof of that is a star-trail photo, which literally shows the path of stars in the night sky over a few hours. Try a long exposure of just 30 seconds and you’ll get blurred stars.
Earth rotates once every 23 hours 56 minutes and 4 seconds – and so do you – so the position of stars appears to constantly move. But why does your DSLR or mirrorless camera need a star tracker for astrophotography? The trouble with photographing the night sky is that the stars move, or rather, they appear to.
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