OVF and WCL-X100
A quedtion to those who have the X100 and the wide extension lens: I guess it is quite visible in the OVF of the X100. How much of a disturbance is that? Does WCL force you to only use the EVF?
It is indeed quite visible. Some care and will only use the EVF because of that, some others don't mind at all.
Here's a terrible photo I took with my iPhone, to illustrate: