When put together, the term "DSLR" itself is enough to explain the science behind how these cameras work. A digital sensor allows for instant image previews and better quality in low-lit environments.

But vintage cameras are making an inexplicable comeback among young people. Old digital cameras are a TikTok craze, and those participating in it are gravitating toward CCD sensors in particular.

The vast majority of new cameras are mirrorless, but there are still DSLRs on sale, both new and used. I've tested hundreds of cameras and am here to explain to fundamental differences between ...