jupiter21m

The Jupiter 21M is the real deal... assuming you have the biceps to wield it. A 200mm f/4 lens from the Soviet era, it captures exquisite details and will only set you back between $30 and $100 on eBay.

It may not be the first place that comes to mind, but the Soviet Union is a great place to start if you're looking for a good quality piece of glass on the cheap.... well, what's left of the Soviet Union anyway.