Cool photos.

However, some look more like multiple exposure than long exposure. Plus I'm curious about some of the MOMA related images that they don't display the 'artifacts' normally associated with back lit buildings and what would be night scapes of a city in even normal length long exposures??

Also there's odd distortions in the 'color' images that that photographers other pinhole work doesn't display? These are optical/mechanical problems that also start to look like either multiple exposure or something else??

One of the site lists that a 2.5 mm hole was made in a pop/soda can to make images? That is an awfully large aperture for long exposures!! Do the math . . .

I will give the one guy credit for being a very capable printer.