Transformers opens at box office with $13.5million

The 3-D film based on toys from the 1980s,Transformers: Dark of the Moon opened to $13.5million at its late night and midnight screening.Action flick is expected to earn between $150 million and $180 million over its first six days in the US and Canada. Transformers: Dark of the Moon, with its big action and special effects, is widely expected to be among the biggest blockbusters of the summer. The story revolves around Autobot robots that battle their foes the Decepticons. Both factions transform themselves into vehicles and other types of machines. Critics are divided about the film, which has earned only a 37 percent positive ranking. $13.5 million opening shows a lot of interest for the film from Paramount Pictures. Last year The Twilight Saga: Eclipse earned a record-setting $30 million in midnight showings.