I purchased a Dove Prism some time back...I finally got around to making a short video of how it works as an image rotator. The image is about as big and almost as bright as a standard 2" lens. In the video I used a regular Kodak Pageant so you will see the flicker
(guess I should not have sold both factory telecine machines)http://www.youtube.com/watch?v=Jvv22wI3qY0