What is the difference between the definition of photos taken by modern film cameras and digital cameras?

Theoretically, film photos can be enlarged without blurring, and the number of pixels of a digital machine is limited, even tens of billions of pixels. There is no comparability.

There is no concept of pixel in the film, because each silver salt particle on the film can accommodate n colors, and one pixel can only accommodate one color, so the color surplus of the film is stepless.

In fact, the enlarged view of film is often not as clear as digital photos, and the main problem lies in the stepless color. It is natural to have excessive stepless colors, but after enlargement, there is no obvious contrast of colors, but it appears blurred. This also restricts the enlargement of the film. The limit magnification of 135 film is 24 inches, and it will not work if it is bigger.

In terms of practicality, digital cameras are more practical.

A camera is a kind of equipment that uses the principle of optical imaging to form an image and records the image with a negative. This is an optical instrument used for photography. In modern social life, there are many devices that can record images, all of which have the characteristics of cameras, such as medical imaging equipment and astronomical observation equipment.