The Diana Cult Camera is a recreation of its famous plastic predecessor. According to the Wikipedia article, "Thee poor quality of the [Diana's] plastic meniscus lens results in generally low contrast, odd color rendition, chromatic aberration, and blurred images." In other words, it takes in real time the sort of lousily ethereal, overfiltered pictures you'd have to spend hours fiddling in PhotoShop to achieve.
The Wikipedia article notes: "The Diana was first produced during the early 1960s in Kowloon, Hong Kong, by the "Great Wall Plastic Factory", and was sold under various labels (often just a different stick-on nametag). Most were given away as novelties or prizes at fairs, carnivals, or other public events." In other words, the Diana is a truly vintage crapgadget. Only £39.99.