I use the Panasonic DMC GM5 Super little camera with a M4/3 sensor amazing IQ and a electronic eye level finder
GM5 with 70-200 equiv lens on Left, Q7 with 06 on right
As for the The Clearviewer on a Q7 it works great BUT be careful not to leave it on the camera where the sun can project through the lens on to the LCD screen. I destroyed mine that way.
See the yellow marks on the LCD they are burned in by the sun focused through the Clearviewer lens and show up bright yellow when the LCD in on an image