Hello all, i just got this lens and i simply love it's feel and i've been taking shots at f8.0 and with the focus set at infinity (hyperfocal distance is about 0.43m). So i'm wondering i wanted to focus closer then 0.43, what should i do? when i turn the focusing ring i don't see much difference through the view finder or lcd screen, i've read somewhere about zone focusing but i still don't quite get the concept yet. Is it when the focusing marking is at 0.3m , anything after 0.3m from the camera will be sharp? please help!