If your camera has the option of high ISO settings then it is possible to get reasonable pictures without flash, even in low light conditions such as halls and display rooms. But these pictures lack the crispness and colour saturation possible with proper studio lighting. One solution is to use a diffuser on your flashgun. These often take the form of reflectors or hoods that clip over the top of the flashgun to soften the harshness of the flash.
I recently bought a diffuser for my Canon EOS 500d but I wanted one that would be usable with the built-in flash. I found what I was looking for on Amazon but similar products are available from many online retailers. This particular product clips into the flash hotshoe and holds a concave plastic diffuser in front of the pop-up flash. It can be left in the hot shoe and does not impede the flash as it deploys.
The pictures below show the difference the diffuser makes to the finished image under the same lighting conditions and set-up. The first image is taken with the diffuser attached and the second is without.
|f5.6 1/60sec ISO400 |