Wow, for those of you serious about photography, you might want to consider playing with this Fiberoptic flash. Basically, you can bunch of fiberoptics and then stick it to your flash to it evenly distributes the flash when you are taking pictures.
This is a fibre-optic flash extension for your DSLR’s popup flash. Totally easy! Works great! Durable! Designed specifically for K20D with 100 2.8 DFA lens but adaptable to other lenses (see Tamron Adaptall 90 2.5 example at the end.) Build your own!