What is the eos shooting button of Canon SLR camera?

The shutter keys of SLR are all in one position, as shown by the red arrow in the figure.

The shutter button is used to take pictures. When it's half time, auto-focus will be started first, and when it's fully focused, press the shutter to take pictures.

When you press the shutter button to take a picture, you don't need to use force at all, you just need to operate it gently. Pressing the shutter button too hard or operating the shutter button too fast will transfer the vibration to the camera, causing the photo to shake and blur.

The influence of shutter speed on the picture

The measure of shutter is speed, and the unit is seconds. Generally, the preset shutter speed of a camera is 1/8000 seconds or 1/4000 seconds, so there are two limit values according to different models. The preset slowest shutter speed is 30 seconds, and you can shoot at any time if you use the B door.

When the aperture and ISO are constant, the faster the shutter speed, such as 1/4000 seconds, the less light will enter the camera and the picture will be very dark. The slower the shutter speed, say 30 seconds, the more light the camera enters, and the picture will be very bright.

If you take a picture of 1/4000 seconds or 1/8000 seconds at night, you will almost get a pure black picture. If you take a few seconds or even dozens of seconds during the day, you can get a pure white photo.

If you are a beginner in photography and can't accurately grasp the shutter speed that you should use in your environment, then generally you can let the camera judge for yourself, and you can use the camera's P file (automatic file) and AV file (aperture priority file).