(Image credit: Sony)

Some people out there really hate 3D movies and will go out of their way to see the 2D version of a movie if there is a choice.

But what happens if your normal 2D movie has the potential to be ruined by the technology as well?

A whistleblower from the US has told Boston.com that 3D lenses are often used to show 2D movies because it's too expensive and time consuming to remove them, which means that your movie is half as bright as it should be.

The problem allegedly stems from the new Sony 4K projectors, which require security clearances and Internet passwords to change lenses, and will shut down if accessed incorrectly. Boston.com says that this is above the level of most movie staff, and so they leave the lens in place.

Director Peter Farrelly said that he saw two screenings of his movie Hall Pass, one with a normal lens and one with a 3D, and he wasn't impressed; "The first screening looked spectacular and the second was so dark, it was daytime versus nighttime ...That's no way to see a movie."

How can you tell if your movie is being shown through a 3D lens? According to Boston.com, you need to look behind you; "If you see two beams of light, one stacked on top of the other, that's a Sony with the 3D lens still in place."

We doubt that it's an isolated case, as you can bet that if it's happening in Boston, it's happening anywhere that there's a Sony 4K projector — including Australia.

Let us know below if you go to a showing that looks darker than normal and has two different beams of light.

Via www.boston.com