When you shoot flash-lit portraits in sunlight, it can be tricky to blur the backgrounds. The problem is the shutter speed which, when coupled with a flash, is often restricted to a maximum flash sync speed of around 1/200 sec.
If you use the sunny f/16 rule we looked at earlier, then with a shutter speed of 1/200 sec, even if you drop to ISO 100, you could only open the aperture up to f/11, which isn’t wide enough for a shallow depth of field.
The solution is to use a flash capable of high-speed sync. This pulses the flash, enabling higher shutter speeds and wider apertures (as in the shot above). But the camera and flash have to be compatible, and it reduces the maximum output of the light.…
