Magic Lantern has a realtime dewarping preview option too for fisheye users.
This is currently set for a Samyang 8mm on aps-c DSLRs I think, but it works well with a 10.5mm Nikkor on full frame, or a Canon 8-15mm at about 10.5mm too. There are two dewarping options -- rectilinear or Panini. It works really well. The frame rate of the camera display (5DmKIII) is almost as fast as normal and the corrections look accurate. It is an extremely handy feature for shooting video or stills that you anticipate being rendered as rectilinear or Panini (or stereographic or equi, or cylindrical) video or stills. The camera just renders the display not the saved movie (stills).
Both preview options make it much easier to level shots handheld while monitoring the display than using the normal uncorrected preview.
This previewing feature works with Raw capture too.
You can compile the source I think to calibrate the correction for different lenses.
--- In PanoToolsNG@yahoogroups.com, "panovrx" <mediavr@...> wrote:
> Here is an example video with a 10.5mm Nikkor at f2.8 1/30th on a 5DmkIII at 1280ISO
> If you want to try this I think these are the best instructions so far
> You need 1000X CF cards for fast frame rates/high resolutions
> I processed the DNG files with Bridge