Recently, I was chatting with some friends who love taking photos and talked about the issue of photo negatives. In the old film cameras, the film was produced first and then the photos were developed. Nowadays, SLR cameras are all digital cameras and do not have film. Where do y

Recently, I was chatting with several friends who love taking photos and talked about the issue of photo negatives. In the old film cameras, the film was produced first and then the photos were developed. Nowadays, SLR cameras are all digital cameras and do not have film. Where do you get the film?

It turns out that what they call a negative is an image recording format, which is the RAW format .

RAW means "not processed". It can also be thought of as: it is the raw data recorded when the light signal collected is converted into a digital signal through the CMOS or CCD image sensor. Data such as shutter speed, aperture, white balance, ISO, etc. are all recorded. RAW is an uncompressed format. It is a kind of original data or the original situation at the time. More vividly, it is also called "digital negative".

The extensions of RAW files generated by different cameras are generally different. The ones I know are listed below.

Fuji *.raf

Canon *.crw, *.cr2, *.cr3

Nikon *.nef

Olympus *.orf

Sony *.arw

Mine is a Nikon camera, this is Nikon's RAW format