Bob Shepherd wrote the article quite a while back about this effect, which is known by many for much longer time. Though I just found out about it. This is an interesting phenomenon discovered by psychologysts. And I am not going to tell you more, just read the article.

Have you ever been interested in the histrory of photography in the Canon dimension? You don't have to leave your chair to visit the museum, which will tell you the whole story - just vist the Canon Camera Museum. The history of over 70 year will unfold in front of you. There story covers years from 1933 to 2004.