Yesterday, WeChat Weibo was screened by the total solar eclipse? In fact, it is super easy to shoot astronomy with a mobile phone!

IT 168 Evaluation On August 2 1 day, a once-in-a-century astronomical landscape of total solar eclipse appeared in the United States. This total solar eclipse spanned 14 states in the United States, forming an eclipse belt about 1 10 km wide. And it can only be seen in America. According to statistics, the total solar eclipse had millions of viewers, breaking the previous viewing record, and the collective absence caused a loss of about 700 million US dollars. Even Google has released a new system to rub the heat of the total solar eclipse, which shows people's attention to this landscape.

When encountering such a rare astronomical landscape, the audience will naturally pick up the camera and record this moment. So can we shoot the solar eclipse with our mobile phones? In fact, it's much easier to shoot an eclipse than to shoot the stars and the moon with a mobile phone. After all, there is no need to consider long exposure, avoiding light pollution, and how to stabilize the mobile phone. You just need to take out your mobile phone, lock the focus on the sun, minimize the exposure and press the shutter.

▲ Professional equipment shooting (picture from the network)

In addition, we need to remind everyone that watching a solar eclipse is different from watching a lunar eclipse. Because of the strong sunshine, you need to wear special glasses when watching the solar eclipse. It is impossible to see with the naked eye, cover it with X-rays and wear sunglasses. It is even more impossible to watch directly with a telescope or even an astronomical telescope. Due to the principle of convex lens focusing, these wrong viewing methods may lead to permanent blindness.

Let's take a look at these two photos of the total solar eclipse taken by netizens with their mobile phones.

▲ netizens use iPhone7 automatic mode to shoot (picture from the network)

▲ netizens use iPhone7 automatic mode to shoot (picture from the network)

Because the wide-angle lens is used on the mobile phone, even though many flagship mobile phones support 2x lossless zoom, it is still difficult to shoot the sun with the mobile phone. The above two photos were taken with iPhone 7. After the maximum digital zoom, although you can barely see it, the photos you get are still not ideal. It can be seen that if you want to shoot things in the sky with your mobile phone, the sun is really not the first choice, so we might as well take this opportunity to talk about shooting stars with your mobile phone.

▲ Li Qiang, the chairman of Nubia, filmed the work "Instantly Eternity".

In fact, it is not difficult to shoot stars with mobile phones. Just master the professional mode, adjust the shutter time, ISO and focus. To be exact, there are actually two, because the focal length is directly adjusted to the farthest, and the rest is to adjust the other two parameters. According to the different debugging of sensors and manufacturers, the shutter time and ISO threshold are also different. So how to adjust these two parameters? It's actually quite simple. You just need to understand their relationship.

In the case of fixed ISO, the longer the shutter time, the brighter the photo will be, and the higher the requirement for the stability of the mobile phone (otherwise, the picture will be blurred easily due to hand shake); When the shutter time is fixed, the higher the ISO, the higher the brightness of the picture, but at the same time, the more noise the picture will be. So our debugging direction is to find the best values of these two parameters respectively, so that the stars in the photo can be seen more clearly, and the higher the purity, the higher the purity. If the situation permits, it is very convenient to have a tripod to shoot the stars. You can try to reduce the ISO and take pictures by adjusting the shutter time, so you don't have to worry about hand shaking affecting the image quality.

▲ taken by mobile phone.

However, the above can only help you shoot stars with your mobile phone, and sending a circle of friends is absolutely enough. But if you want to go further, take pictures of the Milky Way or the orbit of stars with your mobile phone, you can look down.

When it comes to photographing the Milky Way and the orbits of stars with mobile phones, it must be Nubian mobile phones. Mr. Li Qiang, director of Shenzhen Entrepreneur Photography Association, used Nubian Z7 to shoot the work "Instant Eternity" which was collected by Beijing Planetarium. This is the first time in human history to successfully shoot the works of the Galaxy with a mobile phone, and it is also a precedent for the domestic planetarium to collect mobile phone photographs. This is also the marketing focus that Nubia relied on at the beginning of its business, and the "mobile phone that can shoot stars" is also the reason.

▲ Nubian Z 17 Satellite Orbit Mode Parameter Setting Interface

Due to Nubian's accumulation of imaging technology, Neovision imaging system supports a shutter of up to 30 seconds in star-orbit mode. When a user takes a photo of a stellar orbit with a mobile phone, the mobile phone will take a photo every 30 seconds, then synthesize multiple photos through an algorithm, and finally take a photo of a stellar orbit after several hours of shooting. Although it took a long time, the final photo was also very shocking.

▲ Nubian mobile phone shooting

It is not easy to take a perfect picture of the starry sky. First of all, we need to choose a night sky without light pollution. Nowadays, many big cities have been polluted by all kinds of lights, and it is difficult to see the stars even with the naked eye at night. It is best to shoot in the suburbs far away from the city. Secondly, you'd better download a software called SkyMap in your mobile phone, which can help you determine which galaxies are in your location, so that you can find a better shooting angle. Finally, you must be patient in the shooting process. The mobile phone must be kept in a static state, with sufficient power (you can tie the mobile power supply to the tripod) and sufficient memory.

In fact, for most people, it may never have occurred to them that they can shoot the stars with their mobile phones, let alone the orbits of the stars. However, with the development of science and technology, the camera function of mobile phones is becoming more and more powerful, and many mobile phones that once needed SLR can also do it. Regarding this article, if you don't plan to take astronomical photos with your mobile phone, you can also take a good night photo with the photo skills mentioned above.