how would a tripod help? If you don't move chances are the bugs will. Likewise, i dont know where you live but very rarely is there no wind which means the flowers are moving. Therefor F/11 and a low shutter speed like you are implying is asking for blurry pictures all together (like I said this does not apply for product shots/indoor controlled environment stuff) Its all about balance. Also, I suggest using the on board flash when using only the macro lens by itself if you dont have any flashes for the extra shutter speed. It actually works really well, keeping that natural look in the photos.

(in PPG)
hand held, on board flash used at F/9 (~70% crop)
From personal experience, as long as your shooting your 1:1 or below stuff outside you will be fine. Rarely do I go to F/11 when only at 1:1 mag. anyways.
Last edited by yeatzee; 10-29-2009 at 01:14 PM.