What do you pack, and how do you carry it all by yourself, when your assignment includes everything from underwater photography to shooting wild Tree Kangaroos on the other side of the world?

DSLRs from Nikon and Canon can now record High Def movies with sound. But is HD video recording a boon or a bust?

The new Canon EOS 50D and the Nikon D90 are hot–and affordable–digital SLRs for advanced photographers. But which one has the best bang for the buck? The debate is on.