The RX10 MIV seems to me an ideal butterfly-catching rig. Its quick PD AF in continuous mode and close focusing ability have made it easier for me to capture these critters as they flit from flower to flower.
Bursts of 24 fps feel almost like cheating - the ideal wing/antennae/proboscis position may be selected quickly from numerous frames taken a split second apart.
continuous focus, manual exposure in available light, Uniqball UBH45 + Manfrotto 455B tripod, near full frame resized to 800 x 533.