Hello Everyone! I am currently planning a trip to Africa in the fall, and I am looking for some advice on buying a new lens. I currently have a Canon Rebel T1i, with the kit lens EF-S 55-250mm f/4-5.6 IS. I am wanting to upgrade to a longer telephoto lens, but my budget is only about $500 right now. I know that is not a lot, especially when you are talking about telephoto lenses, but thats really all I can spend at the moment. I know Canon makes a lens that goes up to 300mm, that sells for a couple hundred, but it doesn't seem like that big of upgrade. I also know there are other brands like Tamron and Sigma who produce cheaper telephoto lenses, but I am a little hesitant to buy one of those. Basically, I have bits and pieces of information, but nothing substantial enough to feel comfortable making a decision. Hahaha. So any help that you can give me is greatly appreciated. Thanks a bunch in advance! I look forward to reading your responses!