The best replacement for ex3 is ex1.

The best alternatives to ex3 are rated as following:
★★★★★  ex1
★★★★  ex4
★★  hvx200
★  hpx 370
★  fs100
★  hpx500
★  ex1r
★  pmw 200
★  hpx170
  pmw ex1
  af100
  nx5
  xf305
  ex2

Your alternative for ex3 is not listed? Suggest!
Speaking about ex3, one probably shouldn't forget about letus adapter.

Other search terms related to ex3 and their ratings are:
★★★★★ letus adapter
★★★ 35mm adapter
★★★ letus
You have in mind a companion for ex3 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ex3 in all years. Click on graph for more.
ex3
ex1
ex4