You have a very important family gathering+barbecue +birthday party on the weekend. This is a occasion where there are no excuses for not having the right lens with you and if you blunder you will never hear the end of it. You are the official photographer and need to capture grandchildren and grandparents and group pictures and portraits and pictures which you would gift to the full family both indoors and in the garden You have to take just one lens with you and the choice is 17-55 or 28-70. Which one would you take ? (Sorry guys still trying to find out which one has the edge).