03-12-2013 02:02 PM
You'll need a much bigger budget than that. No such lens exists in that price range that can do that.
03-13-2013 01:13 PM
I agree with the others as to your budget is a bit too low for a "better" lens. I purchased the canon 100-400 last year after saving a couple of years and it is so worth the investment. I had the Canon 100-300 and was unhappy with it. The 100-400 is well worth investing in. I also got the 2X converter III and love it as well though it takes a steadt tripod and manual focus.
03-21-2013 10:59 AM
"Need a better lens that can zoom images from at least half a kilometer..."
What are the "images"? If is is a mountain, it is quit different than a bird at 1/2 a kilometer!
My suggestion is the 100-400mm f4.5-5.6 L but a bird at 1/2 kilometer is stillgoing to be pretty small.