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How to do astrophotography? 🌌500/NPF Rule We can do "short-exposure astrophotography" by using: Very short focal lengths, very fast lenses, and high ISO. We could expose up to 20s at most before we get noticeable star-trailing. Then stack all the photos in DeepSkyStacker. Just be wary of noise reduction in post...stars are true point light sources, and noise reduction algorithms can eliminate stars along with noise if you are not careful. 🌌Any easier way? If we want to exposure up to 120 seconds and more at a low ISO without trails, then we need a star tracker. 🌌The mechanism: As we know that the Earth rotates by itself, it takes 23 hours, 56 minutes and 4 seconds to make a 360° rotation. Star tracker rotates at the same speed as the earth, but opposite in direction to compensate the Earth’s self-rotation, then the stars will be (synced) tracked, and they will be relatively still with our camera lens! Then we can shoot the stars just like shooting the general still objects at night, that's to say, low ISO and minutes exposure is applicable! Well yes, we will have a side effect, the blurry foreground (or rather the earth). In this case we just need to make a new photo by turning off the tracker and merge these two images with photoshop later. 👉Let's recap: One shot with the tracker off, to get clear foreground but blurry stars, then turn the tracker on to get clear stars but blurry foreground. At last, merge these two photos in photoshop to get the firnal M

How to do astrophotography? 🌌500/NPF Rule We can do "short-exposure astrophotography" by using: Very short focal lengths, very fast lenses, and high ISO. We could expose up to 20s at most before we get noticeable star-trailing. Then stack all the photos in DeepSkyStacker. Just be wary of noise reduction in post...stars are true point light sources, and noise reduction algorithms can eliminate stars along with noise if you are not careful. 🌌Up to a new horizon? If we want to exposure up to 120 seconds and more at a low ISO without trails, then we need a star tracker. 🌌The mechanism: As we know that the Earth rotates by itself, it takes 23 hours, 56 minutes and 4 seconds to make a 360° rotation. Star tracker rotates at the same speed as the earth, but opposite in direction to compensate the Earth’s self-rotation, then the stars will be (synced) tracked, and they will be relatively still with our camera lens! Then we can shoot the stars just like shooting the general still objects at night, that's to say, low ISO and minutes exposure is applicable! Well yes, we will have a side effect, the blurry foreground (or rather the earth). In this case we just need to make a new photo by turning off the tracker and merge these two images with photoshop later. 👉Let's recap: One shot with the tracker off, to get clear foreground but blurry stars, then turn the tracker on to get clear stars but blurry foreground. At last, merge these two photos in photoshop to get

"Easy to setup even for a beginner, the device is sturdy, but small as promised, the product quality is impeccable. I can recommend it to anyone, especially those who want to keep weight and costs down on earth." - Janos Szekely, US