Photograph the starry sky
Starry sky photography is actually very simple, just need a sunny night. It's hard to photograph the stars, especially in cities where you can't even see them. To get a good starry sky shot, it takes opportunity and skill, as well as preparation for failure.
First of all, it goes without saying that nature is the light pollution in the city. The light in the sky is actually very weak. When we are in the city, artificial light is everywhere. So don't dream of shooting stars all over the sky in the city, at most you can only shoot a few stars. If you want to shoot stars all over the sky, you have to go far away from the city. When you can't see anything, it may be a good place to shoot stars.
In fact, the moon is one of the factors that make us unable to see the stars. As early as the end of the eastern hand dynasty, cao told us a truth in his short song line: the moon is bright and the stars are thin. Just like light pollution, the bright moonlight is also strong light for the starry sky. When there is a big moon high in the sky, the starry sky will also dim.
Therefore, if you want to photograph the sky, you'd better choose when there is no moon. Similarly, we can also use external forces to understand the situation of the moon, by understanding this information, so that we can reasonably arrange our own shooting plan.
If we are not very familiar with shooting stars, it is easy to use slow shutter speed to ensure exposure in low-light environment at night, which may lead to a problem that stars will drag out a long track, which is often called star orbit. The stars don't move, but the earth rotates all the time, which causes the stars we are facing to move all the time. This is something you need to avoid if you don't want to photograph the orbit on purpose.
To control the shutter speed of starry sky shooting, generally speaking, except for ultra-wide-angle lens, it should not exceed 15s, and even if ultra-wide-angle lens is used, it should not exceed 30s. In addition, for stargazing, there is a rule of 500 that refers to the most commonly available shutter speed for our current lens. This rule indicates that the maximum shutter speed of starry sky shooting should be 500 divided by the focal length of the lens. For example, if shooting with a 24mm lens, the slowest shutter speed should be 500/24 = 20.8s; if shooting with a 35mm lens, the slowest shutter speed should be 500/35 = 14.3s.
In order to shoot a beautiful starry sky, in addition to finding a place free from light pollution and choosing a sunny day to take pictures, some considerations should also be taken in the shooting. For example, setting the foreground to make the picture look more vivid, otherwise, a bare starry sky looks and feels quite meaningless.
In addition, the choice of the stars, also need to do some research, at least also want to know the moment we can see what galaxies, where the camera was able to get interesting signs of the zodiac and band across the sky the stars, but now there are a lot of app can provide this information, only need to study to learn kung fu.