I am starting to learn more about my Nikon D5100. I love to take close ups and portraits of people; they are pretty much the only things I enjoy taking pictures of. I read somewhere that with a lens with lower aperture capability I can take nicer pictures, but I have no clue what types of lenses there are, much less what kind I should get. Anyone care to help me out?
Also, I like to take pictures with a lot of depth and focus, mostly in bright light but also in dim lit rooms. I'm looking for something that will let me take smooth, bright and still pictures with a lot of color. Thanks!