If you like blurry old candid photos of people about town, you might be interested in the work of Miroslav Tichý, who from the '60s to the '80s made his own cameras, that were so rubbish they didn't look real, so people didn't behave as if they were being photographed [1]:

https://fstoppers.com/natural-light/photographer-snaps-nearl...

http://uk.phaidon.com/agenda/photography/articles/2013/febru...

https://en.wikipedia.org/wiki/Miroslav_Tich%C3%BD

[1] maybe