Originally Posted by SupraCoup3
I'm trying to figure out how to lower the shutter speed & f-stop whilst blurring the background... Can't quite peg the shutter speed -- I'm either freezing the whole shebang, or I'm blurring the snot out of everything.
The wider open the shutter (lower f stop [aperture] value) the less time the shutter has to remain open to get the right amount of light and the less chance of camera shake causing a problem. Plus a wider open shutter has LESS depth of field, giving more softness to things not in direct focus.
So if you want to use a depth of field softness, you might try setting the aperture value to a low number and letting the camera set the shutter speed (aperture priority mode).
Now if you want to 'track' the subject to get a real MOTION BLUR behind it, then you'll need a bit longer shutter time so you might try setting the shutter speed to what you want (maybe 1/4 second?) and let the camera set the aperture accordingly (shutter priority mode).
I hope that makes sense! There's an inverse relationship between shutter speed and shutter aperture (how wide open).