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Hi Chris,
With regards to video the lack of AA filter, at least as advised by Nikon and on the Nikon sites, is that it is exactly the same as the D800.
The downsizing is so great that any moire is more from the downsizing methods used rather than AA filter or not.
That said I have noticed moire is an issue with the D800E. I haven't seen too many D800 videos to know if its only D800E or both but the advice is that the lack of AA filter makes no difference.
5D3 has less moire but both suffer from rolling shutter. D800 has brighter video for the same ISO (ISO1600 D800 = ISO3200 5D3 for some reason - higher QE?) but 5D3 goes to higher ISO with less noise but both will go to ISO6400 fairly cleanly which is pretty amazing. D800 video is sharper and 5D3 softer but most seem to want the higher low noise ISO over sharpness. Overall I get the impression that the D800 has caught up a lot with Canon on video but the 5D3 may still have the lead.
5D3 uses more of a binning approach to downsizing video whereas Nikon uses a line skipping approach. D800 has HDMI out to allow external recording which is a big plus for the semi - pros who do video. Not useful for me though.
Video ability of D800 has not been taken up much in forums. I did take a short video of Sydney CBD and it had massive moire. But family type videos had none.
Also there are plug in hardware moire filters for both cameras under development and there is one for the 5D2 that works very well. Downside is it costs US$385.
Greg.
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