>>3086832Cool. The aperture was f3.5. I was using high speed sync to crush the ambient light as much as possible (think of your exposure triangle; fast shutter, low ISO) and this means I can have a large aperture.
This give two advantages - the flash doesn't have to work as hard as aperture has the most direct impact on the amount of flash light that reaches the camera and I can separate out background and foreground with a little bokeh.
Not being stuck at 1/250th with your flash makes a word of difference.
