Imported photos are always cropped
Whenever I import a photograph into iMovie for iPad, it is always cropped: I get the full width of the image, but the height is cut to adapt to the 16:9 ratio.
When I pinch the photo to zoom it out and start a Ken Burns effect, I see the full width and height of the picture for a moment but after releasing my fingers, the image reverts back to its cropped size. The zooming doesn't hold and I can never use the full photograph.
Should all photographs apply the 16:9 ratio in order to appear completely?
Thank you very much in advance for your answer.
iPad, iOS 6