Posted 18 June 2007 - 02:31 PM
Posted 18 June 2007 - 03:08 PM
In other words the distance from the subject to the mirror plus the distance from the mirror to your eye/film plane is the real focusing distance.
Posted 18 June 2007 - 04:02 PM
hard to describe without ray diagrams !
Posted 18 June 2007 - 06:08 PM
Posted 18 June 2007 - 10:00 PM
As you can see, if you focus the camera at distance A, the writing will be in-focus, but not the object. The reason bing that to reach the camera (or the eye) the light reflected from the object must travel distance B+A.
Thus, in order for the object to appear in-focus, the distance focused at must be A+B.
Posted 19 June 2007 - 12:11 AM