View original full-resolution image in Aperture 2.0 I want to do the comparison of image quality of 2 lenses, with different settings. For this purpose I need to do the pixel level comparison.
But Aperture stores originals of the files internally showing to the user only previews, that are generated according to the Aperture preferences. Currently I have it set to maximum quality and half of original resolution.

But I want to compare not previews but originals, to see the difference most precisely, at full resolution. Is there any easy way to look at originals and not previews? Or do I have to change the Aperture preferences to full resolution and then regenerate previews? And if I change preferences, will the previews for my whole library get recreated, or only the ones that I manually force to regenerate previews?
I you can just go to the view Menu. And toggle the 'Show Original Image'

 

This will stick a label on the image so you know you are seeing an Original rather than a Preview. 



The setting is global by the looks of it. And works in the compare mode.