Our willing test targets set firmly (they're taped down!) on a table. Initially, they should line up perfectly while your camera is pointed straight ahead. One is very near; the other about a meter farther away. The rear target is a little higher up so I could see both in the viewfinder.

Our willing test targets set firmly (they're taped down!) on a table. Initially, they should line up perfectly while your camera is pointed straight ahead. One is very near; the other about a meter farther away. The rear target is a little higher up so I could see both in the viewfinder.