Awesome. I want one even though I use dedicated astro CCDs. It'd be great for Milky Way mosaics, night time lapse videos.
If its anything like the 20Da it isn't simply a different low pass filter. They tweaked other aspects of the 20Da which simply meant it produced the best DSLR images of any Canon camera in my opinion.
I am definitely getting this beasty. They will be hard to get, go out of stock fast and hold their resale reallly really well.
Who's a good Canon dealer in Sydney??
Also here is a link to the iphone app that can control time lapse on cameras:
http://www.kickstarter.com/projects/...-camera-remote
How awesome is that eh?
Greg.