Is it worth it to swap my Nikon Coolpix L820 for a Nikon D3000? I am new to photography and like to take pictures just for fun. I don’t know much about the technical side of cameras but I’ve been using my Coolpix L820 I got as a gift to take casual pictures for a few years now. Usually I like to take it to the zoo to get pictures of the animals but I have a hard time taking photos through the fences as the a…