I bought my first camera Canon Rebel EOS T3i with Canon EF 50mm 1:1.4 lens. I love the camera and the lens. However, now I am looking to shoot with the ability to zoom in and out as it becomes very difficult to take a picture of a group of people up close. Since there are so many option with zoom lens such as 18-55, 17-85, 18-135, I am not sure which one to go with. I want a quality lens. Please advice. Thank you.

