The generic, non-branded gadget slides into a hot shoe or cold shoe and uses mirrors to bounce the view to the top of the camera, rather than relying on a standard viewfinder or LCD screen.
A digital camera that accepts different lenses but does not use a mirror to reflect the image into the viewfinder. Also called a "mirrorless interchangeable-lens camera" (MILC), "hybrid camera ...
Google Lens currently opens a split view of the camera viewfinder and local gallery, which requires a couple of taps.
Now that we have Circle to Search, Google Lens has been updated so that it immediately starts the camera viewfinder upon launch.
Viewfinder may not be perfect ... At first, you use pre-printed photos to delete barriers; fixed cameras introduce you to making your own images; soon, you have your very own Polaroid camera ...