Hi Everyone, Thank you for looking at my post. I'm so confused here, please help. is a higher F number (smaller apeture) will give better sharpness? that's what I read and understood, but it's the other way around when it comes to my photos. i got sharpest at f8, then f13. and the higher the fnumber, my pictures are just getting more blury. (of course all other factors are being the same---I can adjust the lighing on my profoto to get higher F-number for the same amount of light). I got a nikon D300 with the 18-55mm kit lense. thanks a bunch for your help. EV.