I don't really get what the Imax footage is all about. Were the deleted scenes added in for Imax theaters?
I appreciate any help. I'm a little put out at the whole double dipping here, so I want to know what exactly I'm getting when I buy this movie all over again.
Several portions of the film were shot with IMAX cameras. The full IMAX (about 30% of all IMAX screens out there now) is gigantic and at a 1.44:1 aspect ratio. Smaller, "Digital IMAX" cinemas have large screens, but not necessarily larger than the biggest non-IMAX cinema screens (their chief advantage is a better sound system). I saw the movie at a full-sized IMAX cinema and when the IMAX portions were on-screen, the whole screen (about 3 times the surface area covered by the regular aspect ratio) was filled. It made for some spectacular shots (the last 2 Nolan Batman movies also contained this kind of footage).
For home use, the IMAX scenes will fill in the top and bottom black bars (mimicking, albeit imperfectly, the effect of the full IMAX visuals) without zooming the image. The 2 Nolan films have this feature on Blu-ray and I was hoping it would be available for this movie (and now it will be--to me, it is enough to double-dip).
The effect is best appreciated on a large screen or sitting very close to the screen, in order to get the immersive effect. If someone sits 10 feet from a 32" (even up to mid-40"), it may not prove all that impressive. I have a 64" screen for my front projector (large for a display, but small in the sub-category of front projectors) and the effect is very impressive (but I sit 7 feet from the screen--I have watched the Nolan films on a 40" screen at a friend's house and the effect was not nearly as impressive).
The other thing some people notice (I do) is the enhanced resolution of the IMAX footage. The footage looks sharper and more detailed, without touching any settings on the display. The drawback to filming in IMAX is the bulky and noisy camera--not suitable for more intimate, dialogue-driven moments (unlikely you'll see an IMAX remake of The Remains of the Day or Glengarry Glenross, for example). But for "big picture moments", IMAX is fantastic.
For non-IMAX screenings, the IMAX footage was simply cropped to fit the regular aspect ratio.