Originally Posted by
Bitter Jeweler
:eek:
Nearly all lenses are soft wide open. Stopping that lens down to f/1.8 will help, and you still get beautiful bokeh. Your DoF at f/1.2 had to be like razor thin, no wonder you have trouble focusing. I'd think you want to get that whole bud in focus, and blur the background. With that lens wide open, even on a "dark" day, ISO 100 would suffice.
Why would you want to fix your shutter speed, and go from there?
If you are not shooting sports where shutter speed is important, set your aperture for the desired DoF you want and let the rest fall into place.