Nikon's first truly beginner-friendly DSLR turns 10 years old this month. The Nikon D40 was introduced in November of 2006, bringing with it for the first time on-screen tips for novice digital photographers. It was the company's smallest and lightest DSLR at the time, paring down some of the more advanced features found on the likes of the D80 and the D50, and was the first... more