I thought of doing a brief survey to see what people use with the RX100 and also share some experiences
I use the following for my RX100
Flat lenses for video
Inon UWL-H100 28LD
Inon UWL-105AD
Fisheye for stills
Inon UFL165 AD
I use the following for my RX100
Flat lenses for video
Inon UWL-H100 28LD
Inon UWL-105AD
Fisheye for stills
Inon UFL165 AD