emanswfan said:
Honestly, I would just prefer to shoot the whole film with the same camera and aspect ratio as I like consistency. I's probably wouldn't have much of a problem with it if it was one of the spinoff films, but this a main episode. It should be more consistent with the original visual style.
BUT, if they have to do it. It should just be one long continuous sequence that changes at a climactic or emotional point. I like how Catching Fire did it (seen here), with having the aspect ratio change make sense somewhat logically in terms of the plot. Also, the shot is dark enough and the bars change slowly enough for it not to be painfully jarring. In the IMAX theatre, it was a true WOW moment. Plus it continued that way for 50 full minutes till the whole arena sequence was complete and they even had the character pass out, between the aspect ratio change back to 2:35:1.
Mission: Impossible 4 also did the slowly-changing bars thing when Ethan Hunt starts his climb up the Burj Khalifa. It was a nice little wink to the audience. They kept the cutaways to interior shots during the climb sequence at the same AR, which means they either shot those in full 15/65 as well or simply used 8/65 or 4/35.
Some of the 50-minute arena scene in Catching Fire was shot in 4/35, since it would've been extremely difficult for the camera man to lug an imax camera around (although they did do exactly that for some of the shots). Getting the proper depth of field for some of the shots was also a factor in using 4/35. Also, as mentioned, there's the issue of recording natural sound without the camera noise.
As for the use of Imax "breaking the tradition," I have way less of a problem with them using a much larger format for certain stretches of the film than I do with them using 2/3" hd cameras for two entire movies. Most people will only be seeing it in constant-height 2.35:1 anyway. The blu-ray and dvd transfer is another issue, but I'd imagine they'd make separate sku's available and would make the constant 2.35:1 version the priority.