Perhaps many of us who already have a camera and lens are sophisticated, expensive but we rarely even use it often at the site. The reason is because of the size and weight of cameras and lenses are large and heavy. Another reason since it was expensive and security reasons.
Then what a compact DSLR camera system for a walk?
1. DSLR cameras are small / usually intended for beginners like Canon 550D, Nikon D3100
2. Standard lens 18-55mm f/3.5-5.6 is