The "retro camera" craze is sweeping the market. High-end models like Fujifilm's X100 series or Ricoh's GR3 are hard to get even with cash in hand, commanding hefty premiums and costing anywhere from $1,000 to $2,000 on the used market. But let’s look at it objectively. What is the fundamental reason those expensive "aesthetic" cameras produce such great photos? It is because they use an APS-C (..