I'm still slightly struggling with my nifty, i think i need some more practise with apertures.
I always use the AV mode when i've got my nifty attatched, and i seem to struggle with getting photo's of cars totally in focus, all over the car. I shoot at about F8 - F9, but i always find it goes slightly soft at the furthest away edges.
Am i making an un-known mistake?