Image correction.
 

I have been thinking of correcting image, there is 1 idea came up that I think will work. In stead of correcting image before comming to the camera, get a Schmidt prism to correct image in the viewfinder. There are some benefits of doing it this way:
- No quality lost because of prisms. (flip image in post)
- Smaller prism means less expensive
- 45 degree off in the viewfinder is easier than tilt the camera 45 degree
Has anybody done this?

Quyen