Extra-low dispersion lens

Prime Lens vs Zoom Lens August 7, 2020

Prime Lens vs Zoom Lens

What are prime lenses and zoom lenses?Most ordinary Defocus Control (DC) lens can also "zoom far and zoom near" to compose pictures. It is indeed very convenient. In the world of digital single reflex (DSLR), the lens can be replaced. Of course, there are also this kind of lenses that can zoom near and far, but...