You can find a lot of camera lens options out there that offer different characteristics. While different camera lenses are useful in different scenarios, you can consider buying an all in one zoom lens if you just want to keep one lens with you. As per the name of these lenses, they are an all in one lens that offers a wide range of focal lengths. This includes both wide as well as telephoto focal lengths for taking all kinds of photos using a single DSLR camera lens.