What does iso mean in mobile photography?

Sensitivity is a measure of the sensitivity of negative film to light, which is determined by sensitivity measurement and several values measurement. Commonly used expressions are ISO 100, 400, 1000, etc.

Generally speaking, the higher the sensitivity, the coarser the particles of the negative film, and the worse the effect after amplification.

When the ISO value increases by 1 times, the photosensitive speed also increases by 1 times. For example, the sensitivity of ISO200 is higher 1 times than ISO 100, ISO400 is higher 1 times than ISO200, 4 times higher than ISO 100, and so on.

Skills of expanding information and taking photos with mobile phones at night

1, stabilize the lens

It is easy to take blurred photos when shooting at night, so the way to expose the lens correctly and ensure that it will not appear too dark is to shoot with a slow shutter when the light in the shooting scene is insufficient. In order to prevent the camera from vibrating, you need to keep the camera as stable as possible.

Using a tripod is the best choice. If you don't have a tripod, make do with peripheral tools, such as putting your mobile phone on a wall, railing, window edge or other solid surface, or keeping a vertical angle with books or stones.

If you are worried that your phone will shake when you press the shoot button, you might as well plug in headphones and use the volume button as a remote shutter button, so you don't have to touch the screen.

2. Moderate exposure

When taking pictures at night, due to the dim ambient light, in order to get enough exposure, the mobile phone will automatically increase the sensitivity (ISO) to get enough light. If the sensitivity is too high, the photo will produce a lot of noise, which will affect the quality and clarity of the photo.

The purpose of using mobile phone mode is to reduce the noise of photos and improve the quality of photos. By adjusting the shutter and extending the exposure time, you can also take photos with sufficient exposure, thus ensuring the quality of photos.

References:

Baidu encyclopedia _iso