This is probably normal but I don't recall seeing it before. It's been a while since I used the Q, so maybe I'm just forgetting.
When I turn the diopter to focus the finder, I can wiggle the diopter housing back and forth just a little. The threaded base of the diopter is snug in the control box so it's not that, and the eyepiece is screwed in the diopter all the way and snug.
Has anyone seen this, just curious.