I used to get requests for "technique" pages based on images that I had posted when I did monthly updates. This one received a record number of requests!

Jacqueline Wilson is one of the world's best selling childrens' authors. I had to take pictures of her twice in ten days and the first set of pictures (including the left had one below) were taken at a press launch for the UK's National Fostering Fortnight - a charity of which she is a supporter. A few days later I went to her home in Surrey to take some different pictures and amongst them was this one of her looking through one of the many boxes of childrens' letters that she gets every month.

This gave me a flash exposure at 100 ISO of f5.6 which was plenty and so I dialed down the shutter speed to 1/250th just to make sure that there was no ambient light in the picture. This made some decent pictures but I decided to allow the available light to play a part in the exposure too and so I changed the shutter speed to 1/8th of a second which meant that it was still about one and a half f-stops under exposed. The flash was illuminating the author's face nicely and the insides of booth the box and the lid were also well exposed using this pretty primitive technique.

The thing that helps with the magic of this picture is the movement, which is achieved by actively moving the camera whilst the shutter is open. I have talked about this before and so won't go back too much over the theory behind it except to point out that I normally don't like flash and blur images where there are no points of light to give that blur. Evenly lit scenes are normally very difficult to make good blur from and it only worked in this case because the author's face was slightly in shadow and because the available light exposure is still over one stop underexposed at 1/8th of a second at f5.6 on ISO 100.

The flash and blur picture above as shot on a Canon EOS1D MkII with a Canon 16-35 f2.8L lens. The flash used was a Canon 550ex triggered with a Pocket Wizard. For the record, the image on the left was shot on the same model of camera with a 24-70 f2.8L lens. It was shot at ISO200 using a Canon 550ex flash with a Sto-fen off to the right of the camera about two metres away and there were white walls and a white ceiling to reflect plenty of light back to make the lighting reasonably soft and quite flattering.