Thanks for the reply..and sorry for my late response..
I've drawn a rough sketch according to your calculations..
http://imageigloo.com/images/1005sketch.JPG
The calculation with upper trangle with refraction is not clear for me..As I know, the green color light beam should go to Camera...
Hi,
I need to know whether Refraction changes current focal length of a camera..I have a camera focused at the bottom of a water tank(without water). After filling water to the tank i cannot see the bottom anymore focused..I need to calculate how much should I move the camera vertically to...