DSD

An inter­est­ing pro­peller pic­ture via Global Nerdy:

The cheap CMOS sen­sor of an iPhone does not expose the whole thing at once, it scans from left to right. If you take a pic­ture of some­thing that moves very fast (like an air­plane prop) you can get some crazy pic­tures out of it since each col­umn rep­re­sents a slightly dif­fer­ent time.