I'm not in the market for one, but it caught my eye. Less than £4, collect in store. Might be useful to some.
[h=2]Rogue Pop-Up Flash Booster[/h]
It is designed to work with crop-sensor (APS-C/DX) Canon and Nikon DSLRs. While this Safari Pop-up Flash Booster is compatible with the vast majority of modern DSLRs, some early model cameras, including the Canon 10D, 20D and 30D will not accommodate the adapter.
http://www.jessops.com/online.store/categories/products/rogue/pop-up-flash-booster-89625/show.html
[h=2]Rogue Pop-Up Flash Booster[/h]
- No Batteries Required
- Optically Engineered Lens Concentrates Light
- Optimized for Lenses Over 100mm
- Mounts to DSLR Hot Shoe
- Molded from rugged polycarbonate materials
It is designed to work with crop-sensor (APS-C/DX) Canon and Nikon DSLRs. While this Safari Pop-up Flash Booster is compatible with the vast majority of modern DSLRs, some early model cameras, including the Canon 10D, 20D and 30D will not accommodate the adapter.
http://www.jessops.com/online.store/categories/products/rogue/pop-up-flash-booster-89625/show.html