OK. Need some help. Two pics below. Both were taken with my D90 and 50mm 1.8D. The first one (orchid) was shot at 1/4000, f/2, ISO 100 and is decently sharp. The second was shot at 1/1000, f/1.8, ISO 400. Both were shot at near minimum focusing distance on the 50mm. Why is the second so blurry? (not the bokeh but the flower...I was focusing on the center of the flower) Is there that much a difference between f/2 and f/1.8? I wouldn't think the ISO and shutter would've had that much to do with it. 1/1000 was plenty fast. Is there something else I'm missing? I know the 50mm is in now way a macro lense but I'm usually able to get good shots with it at it's minimum distance. I shot a bunch of these today trying to get f/1.8 to produce something nice but no luck. My one thought was that there was a slight breeze and that f/1.8 at minimum distance produced such a shallow DOF that the flower was moving in and out of focus as I shot?? Thanks for the advice.