Canon Macro Twin Lite MT-26EX-RT Camera Flash

I switched out my ring flash for one of these. It is more expensive but it handles all my posterior and anterior photography as well. It is the flash used and recommend by Minesh Patel who does some of the best dental photography out there (check him out). I use it with his Bounce diffusers. As the flashes can be adjusted you can avoid a lot of reflection in your images. Can be used with DIY paper diffusers as well.