Check out these striking tin type portraits by Michael Shindler, done using the wet plate collodion process invented way back in the 1850´s.

Instead of megapixels, or even film, the process can be described like this:

The Wet-Plate Collodion process, first introduced in 1851, involves coating an enameled metal or glass plate with a collodion mixture, which is then sensitized, exposed and processed all within a few minutes and while the plate is still wet. The resulting image (while technically a negative) is made up of extremely fine silver particles that are creamy-white in color, which allows the image to be viewed as a positive when seen against a black background.

Impressive.

Should you find yourself in San Francisco, you can actually have one done of yourself here.