D80 + 18-135 lens problem?
I've had my D80 for a little while now and am pretty happy with it but over the past few days (as the sun's come out finally) I've just been snapping pix of flowers etc and have been noticing that the vast majority of them are just out of focus. There's absolutely no problem with the wide open shots but anything involving close focusing seems out. I've tried with a tripod, hand held, various ISO settings, DOF settings via aperture but nothing seems to be quite in focus when close.
Is the 18 to 135 lens know for any near soft-focus problems?
I borrowed a friends D40 and the 18 -55 lens on that seems a little sharper than my 18 to 135!
His 55 to 200VR lens is also soft close up.
Please, can anyone help? I don't think I'm doing anything wrong - it's a bright sunny day and I'm using f8 to F20ish at speeds over 1/125.