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?