...large-format camera...My brain self-corrected the image that I was seeing, I saw the image in its normal upright position as if I was feeling without the camera.
I just realized over the weekend that I've had a similar "brain-training" thing when using my WLF on medium format. When I first started with that last year, the left/right opposite thing really messed me up. Somewhere between then and now, its become automatic. And I've been shooting with it so much that I occasionally find myself getting it "wrong" when I'm using a camera with a prism finder.
I shoot digital when I have to (most of those shots end up here) and film (occasionally one of those shots ends up here) when I want to.