I am a newbie to photography and am wanting to upgrade my camera. Currently have d3100 and considering d5300. I realize not a huge jump, but can't afford much more than that at this time. QUestion I have is regarding one of the lenses I have purchased...nikkor af 50 1.8. If I get the 5300, will the autofocus function be enabled? I am really struggling with the manual focus still and missing a lot of shot opportunities with my kids.