http://www.slashfilm.com/2009/05/11/why-you-probably-shouldnt-waste-5-more-for-digital-imax/#more-27925

Slashfilm article about why you shouldn't waste your money to see a film on IMAX if it was not shot on IMAX cameras. The new thing is to release these big budget super effect driven films on IMAX when they really are not shot on IMAX cameras. This short article discusses how the Dark Knight used real IMAX cameras for a good number of scenes including everyone's favorite car chase through the tunnels and flipping the 18 wheeler. However, films like 300, Watchmen, and Star Trek were just blown up to IMAX format from their original 35 mm format. Not to mention the fact that these films are not being projected on FILM PROJECTORS, but Digital Projectors. You make the call, I don't like it. Granted you are still seeing the movie huge on a big ass screen and thats kinda cool, but to call the movie IMAX is misrepresentation and not the truth. One thing you can do is look up IMDB and click on the aspect ratio, look at the differences between the Dark Knight and Star Trek.