Hey guys and girls! I purchased the Olympus 9mm f8 body cap lens on Sunday and so far it's great! Only downer is the f8 part. Now to counterpart this, how good is the 9-18mm Olympus lens? I know its around £300 more, and i'll be benefitting from f4 maximum aperture and 9-18 focal length, but is it worth the extra? Also, I can't seem to find out anywhere if the Oly 9-18 i classed as a fisheye lens or not? Does it have the same kind of effect as the 9mm body cap lens? While i'm at it, if anybody has or has shot with something like the Samyang 7.5mm, is that any better? Any input is appreciated!