I’m not sure about a “far cry” from 18 feet. The angle at which the picture was taken makes it difficult to tell the distance. If we’re fact checking following article sheds some light on the topic.  https://cdn.citl.illinois.edu/courses/aiiopcmpss/essays/chicagomem/chicagomem10.htm

I didn’t read your comment, but I have a feeling it was worthless. Can someone else read it and tell me?