Ask Canon G 12 about the configuration and connection of shutter speed, aperture size and sensitivity. There are also settings in different environments, thank you! Be as detailed as possible.

Generally speaking, shutter speed, aperture size and sensitivity are mutually restricted.

Let's talk about the aperture size first. Aperture size indicates the amount of light entering the lens per unit time, and is expressed by F value, such as F2.8, F4, F5.6, F8, etc. The smaller the value of f, the larger the aperture, which means that F2.8 is larger than F8. Aperture has two main effects on exposure. Firstly, the larger the aperture, the faster the shutter speed while maintaining the same exposure. The second is that the larger the aperture, the shallower the depth of field, that is, the more virtual the background.

In addition to the shutter speed, the shutter speed also controls the exposure time of the camera, expressed in seconds. When the aperture value is the same as ISO, the faster the shutter speed (for example, 1180 is faster than 1/30, and 1/30 is faster than1sec), the greater the camera exposure.

In other words, when you fix the aperture and ISO, you have to slow down the shutter speed to get enough exposure in a dim environment, otherwise the picture will be very dark. Relatively speaking, when you are in a very bright environment, you should increase the shutter speed accordingly, otherwise the picture will be white.

Then there is ISO, which is the value of camera sensitivity. The larger the ISO, the stronger the photosensitivity. While keeping the shutter and aperture unchanged, improving ISO, that is, improving the sensitivity of the camera, will make the picture brighter.

In terms of quantitative relationship, when the exposure is the same, the relationship between them is as follows:

When the aperture becomes larger (F value becomes smaller), ISO can be lowered or shutter speed can be increased. When the aperture decreases, the ISO should be increased or the shutter speed should be decreased.

When ISO is improved, the aperture can be reduced or the shutter speed can be increased. When ISO decreases, the aperture should be larger or the shutter speed should be reduced.

When the shutter speed increases, the aperture should be larger or the ISO should be improved. When the shutter speed decreases, the aperture can be reduced, or the ISO can be reduced.

ISO, shutter speed and aperture value are three indicators that people who study photography must learn and master. Generally speaking, it is necessary to learn systematic knowledge and cooperate with a lot of practice in order to use these three values freely in various environments and obtain the best imaging effect. So, in fact, what I said above is very superficial and general. If you need to know more, I strongly recommend that you go to the bookstore to buy (or download) some photography tutorials and photography teaching materials and study them carefully (there are also many VERYCD).

For beginners, don't rush to use the full manual M file, otherwise even the exposure control of the photo is not satisfactory, let alone whether the exposure combination of this photo has played the top ten success forces of G 12. My suggestion is to use AV file (aperture priority mode for user to set aperture value) or P file (change to automatic exposure), and also cancel the setting of "ISO automatic", and then manually set the corresponding ISO value in the corresponding environment.

Generally speaking, the brighter the ambient light, the lower the ISO value. It depends on your shutter speed at this time. When maintaining the shutter speed of 1/30 seconds (a "safe shutter" that can ensure film production) or faster, the lower the ISO, the better, and the aperture can be reduced to F4 accordingly.

The three most common settings for Av files (AV files are set by the body, so the shutter speed is not our concern):

Clear Wan Li time, aperture F4 ISO80；;

On cloudy days or indoors, ISO200, aperture F2.8 (if there is optical zoom, the maximum aperture that can be used after optical zoom);

At night or when the indoor light is very dark, ISO800, aperture F2.8

If you have any questions, please ask.