In the (excellent) Camera Labs D800 review page below: http://www.cameralabs.com/reviews/Nikon_D800/Nikon_D800_vs_Phase_One_medium_format_quality.shtml
Gordon Laing 'stitched' together two D800 images to produce a 72 MP image which clearly produced additional image details.
question is, how did he do this? (What software and what menu options/commands?)
question is, did he first register the two images, and if so, how (what software + menu option/command)?
question is, are there any commercial software products which support sub-pixel accuracy image registration? (This would be useful for HDR, SNR stacking, and focus stacking.)