The focal distance is typically from the camera sensor. The "working distance" is from the front end of the lens. So the minimum focus distance of 9 inches has probably around 6 inches taken up by the lens, leaving the other 3 inches for the working distance.
The focal distance is typically from the camera sensor. The "working distance" is from the front end of the lens. So the minimum focus distance of 9 inches has probably around 6 inches taken up by the lens, leaving the other 3 inches for the working distance.
Definitely correct on that one.