I am new to the camera world when it comes to anything above a point and shoot. I have a Canon XS and was wanting to upgrade to a better zoom lens. I would like to be able to photograph deer or birds out to about 100 yards with decent quality. I have no clue what I am looking for and I know no one personally who is into photography that I can ask. I don't want an "L" lens since I don't plan on spending that kind of money. I'm just looking for something decent to take some pictures with. I have seen the 55-250 lenses at a decent price but I don't know about the quality or the range. Thanks for any and all advice.