Sony FCB camera block
What are the three elements of camera exposure? Aperture, shutter and speed.
They all affect the exposure of the photo, so they must work together to ensure that the photo exposure is normal. So how do these three work together to get a properly exposed photo? What is the concept of large aperture and high speed of SONY FCB-EV7520?
1. Aperture
The aperture is a component in front of the lens that consists of multiple mechanical blades that control its opening and closing, thus controlling how much light enters the camera sensor. The larger the aperture, the more light entering the camera sensor, the brighter the photo, but the value of the aperture is the reverse, F2 aperture is a large aperture, while the F10 aperture is a small aperture, in addition, the aperture can also control the depth of field, the larger the aperture, the shallower the depth of field, the more obvious the background blur, the smaller the aperture, the deeper the depth of field. The front and back details of the landscape can be better revealed.
The aperture is usually expressed as F x.x or f/xx.
The aperture value of the SONY FCB-EV7520 is F1.6 to F4.7, which is a large aperture camera, which can greatly improve the image quality.
Many people like to get a blurred background effect when taking portraits to highlight the model, so they generally choose a large aperture, as shown below:
Camera large aperture effect
When taking scenery photos, in order to show the details before and after the scenery, a small aperture is generally used, as shown below:
Camera small aperture effect
2. Shutter
Shutter, is the camera shutter from the start to close the time, the smaller the shutter speed value, the less time the shutter opens, the less light into the number of sensitive elements, the photo will naturally be darker, the greater the value, and vice versa.
What people call high-speed shutter is that the exposure time is very short, so it can freeze the moment of the movement of the object, such as 1/800, 1/1250 and other values belong to high-speed shutter, usually used to shoot high-speed moving objects.
To use an analogy, the camera is like a faucet, the aperture controls the size of the faucet open, the shutter controls the time of the faucet open, and the two together constitute the water output of the faucet.
The shutter is usually expressed in 1/xxx second
SONY FCB-EV7520 shutter priority is adjustable from 1/1 to 1/10,000 second, with 16 high shutter speeds plus 6 low shutter speeds, and automatic gain.
3. ISO speed
ISO is the sensitivity of the camera sensor to light, that is, speed, the higher the speed, the more sensitive to light, the resulting photo will be brighter, the lower the speed is vice versa. However, the higher the sensitivity, the more noise of the photo will be, the worse the quality of the photo will be, so generally in the case of ensuring the shutter and aperture, try to choose a low sensitivity to shoot, so that you will get a better picture quality photo.
The influence of camera speed on photo quality
As can be seen from the figure, the higher the sensitivity, the worse the picture quality
Sum up
So in general, in order to control the exposure, you need to understand the relationship between aperture, shutter and ISO at the same time, and the relationship between them can be used to help remember.
The relationship between aperture and shutter and ISO
Look at this picture, you can roughly know what is going on between the aperture, shutter and ISO
▼
The relationship between camera aperture, shutter, and ISO
The most direct manifestation of any of these changes is the exposure of images, and the trends are the same.
The larger the aperture, the greater the amount of light, the brighter the picture.
The longer the shutter time, the greater the amount of light, the brighter the picture.
The higher the ISO, the brighter the picture.
Knowing the relationship between aperture, shutter and ISO, we should pay attention to it when taking photos, and we should match it reasonably. Of course, if it is fully automatic mode, it is easier, just press the shutter.
SONY FCB-EV7520 is a SONY auto focus variable times integrated camera, using a new image sensor and unique ISP, with high-definition shooting mode, coupled with a new fog removal function and wide dynamic greatly improve the picture clarity, more suitable for use in security monitoring, intelligent transportation, medical industry, Marine operations, drones and other industries.