Hi everyone, I have a newbie question regarding my camera lenses. I hope I’m posting this in the right place. I recently purchased a Canon T2i, included with the camera were two lenses-18-55 mm and 55-250 mm. I later bought a 50 mm 1.8 lens which I truly love to photograph my kids with. A friend is offering to sell me his 18-135mm lens , which was barley used. I guess my question is since I have the 18-55 mm and 55-250 mm lenses, is there any advantage to having the 18-135mm as well? All I can think of is that I can use it as a walk around lens?? I appreciate any input!