As I wrote in Part I of this post, below, it seems to have become a “forum truism” that the 4/3rds sensor size (13 x 17.3 mm) is woefully inadequate and can’t compete with the allegedly more desirable APS-C sensor size (14.8 x 22.2 in Canon cameras). I made the argument that assertions for the superiority of the larger size were dependent on direct, controlled comparisons, and that any differences are actually probably too small in magnitude to reliably detect if people were simply looking at…