Why do you choose raw+jpg for the photos taken by the camera? Are there two copies of this shutter installed at a time? Even if post-processing is needed, jpg format can be used.

First of all, understand what is the raw format, Sogou Encyclopedia: the original meaning of RAW is "unprocessed". It can be understood that the RAW image is the original data that a CMOS or CCD image sensor converts the captured light source signal into a digital signal. RAW file is a file that records the original information of digital camera sensor and some original data (such as ISO setting, shutter speed, aperture value, white balance, etc.). ) camera shooting production. RAW is an unprocessed and compressed format, which can be conceptualized as "original image encoded data" or more vividly called "digital negative". When saving the file in RAW format, the camera will create a header file containing sharpness, contrast, saturation, color temperature, white balance and other information, but the image will not be changed by these settings, they are just marked on the RAW file. Then, the original file will be saved to the memory card together with these settings and other technical information.

However, JPG format photos will lose a lot of data after some compression, and information such as color temperature, contrast and sharpness will be partially discarded, so the amount of information is much less.

If you are a professional photographer, or want to be a professional photographer, do post-processing in raw format, so as to get the information you need to the maximum extent. If you just want to learn photography, you don't have too high requirements for image quality, and you think that the raw format is too big and it is too slow and troublesome to process, then JPG is enough. I belong to the latter. Maybe when our level is advanced to the advanced stage, we can see the difference between students and JPG, and we will take the initiative to choose students. I also like photography. Welcome to discuss!