How did astrophotography begin?

The starting method of celestial photography is as follows:

1. Choose the right time and place: You need to choose a place without light pollution to shoot the starry sky, preferably in the countryside or mountains. In addition, it is also important to choose a clear and cloudless night. It is best to shoot when the moon is not very bright, because the moon will light up the night sky and make the stars less obvious.

2. Prepare necessary equipment: You need a camera and a tripod to shoot the starry sky. It is best to use a full-frame camera, because it can capture more stars and more details. In addition, you need a remote control to avoid shaking when you press the shutter.

3. Set the camera: Set the camera to manual mode and set the ISO to the lowest. Set the shutter speed to 20 seconds or faster to capture more stars. Turn the aperture to the maximum so that the camera can collect more light. In addition, turn off autofocus and focus the camera to infinity.

4. Use a tripod: Using a tripod can prevent the camera from shaking when shooting, resulting in blurred photos. Put the camera on a tripod and take pictures with the remote control.

Advantages of celestial photography

Before the appearance of astrophotography, visual depiction became the only way of recording besides written description. However, this description has the disadvantage of subjectivity. The same observation object, different people will get very different results. Astrophotography is more objective. In addition, it can record a lot of data of celestial bodies at the same time, including luminosity, color and other data.

Past observations can only be achieved with naked eyes and telescopes. However, there are still a large number of celestial bodies invisible to the naked eye, partly because the relationship is extremely dim, and another reason is that electromagnetic waves outside the visible spectrum cannot be seen by the naked eye. The former can be exposed for a long time, and the light of dim celestial bodies can be accumulated on photosensitive elements (traditional negatives or photoelectric coupling elements).