Hello, longtime lurker here. On this thread's (and Andy's) glowing recommendation I recently picked up one of the angenieux-design Tokina 28-70 f2.6-2.8 lens... (the PRO II version with bayonet hood) but unfortunately, in my excitement for a great ebay deal, I didn't realize that the canon-mount version I bought doesn't have manual aperture adjustment like the nikon-mount does, which is a bummer. But I was curious, because even in one of my canon cameras, the widest aperture it will show (electronically) is 2.8, not 2.6. Has anybody else experienced the same thing? Also, looking at some of the nikon mount versions on ebay, even though all of them say 2.6-2.8 on the front element, the aperture ring shows 2.8 on some of them, 2.6 on others, just has me a little confused, is this one of the differences between the PRO I and PRO II variants? Can any of you lens experts set me straight? Thanks!