How long is the exposure time of iphone?

1. Open the camera that comes with the Apple system, and you can see a button like the sun at the top. Clicking Open actually opens the live mode, not the live broadcast.

For photos (dynamic photos), the system will synthesize the photos 1.5 seconds before shooting and 1.5 seconds after shooting, and keep the sound. When the subject is moving at high speed, the effect of "long exposure" can naturally be obtained.

2. Of course, the long exposure of this system cannot adjust the shutter speed and other parameters by itself. If the photographed object doesn't move so fast, the photographed effect may not be much different from that of the static one, and the effect as shown below will not be obtained.

3. Then, you can try to use a third-party camera app. Here is an app called "Slow Shutter", which is a mobile phone software specially used for shooting long exposures. You can find it in the app store. If you want to recharge, you can go to a treasure and buy one for a few cents.

4. Open the settings and you can see that there are three modes: dynamic blur, light track and low light mode. It depends on the shooting. Sensitivity, shutter speed and ISO parameters can be customized. The slower the shutter speed, the longer the trajectory.

5, master two methods, you can try to pat yourself to see long exposure, in fact, it is not difficult to achieve.

1, exposure is the combination of aperture, shutter and sensitivity ISO. It can be considered that the aperture (numerical value) is actually how big the small round window is, and the shutter (speed) is how long the window has been open. Assuming that the window is only open for 1/4 4 seconds, it is obvious that if the window is half open for 2 seconds, the film can be exposed correctly, because1/4 * 4 =1/2 * 2 =1,and the light input is the same.

2. Similarly, if the window is fully open, the exposure time only needs 1 second.

If the aperture of a lens is F4, and in photographic terms, the shutter speed of F4 is 1 sec, which is the correct exposure value, then F5.6 and 2 seconds, F8 and 4 seconds can also get accurate exposure pictures.

Important conclusion: A correctly exposed photo can have n different combinations of aperture and shutter speed.