Review on CX3 variants CX4, CX5 and CX6 are less trifles identical.
Conclusion:
A really great camera – in 2010, Still fast and with outstanding macro by 2017 (compacts)
…though a bit boxy and thick (almost 3cm thick).
Macro examples: Dust on a dead flies eyes and subpixels from a QFHD (3840×2160) monitor