I just got my camera. It is D5100. I have 2 lens. I have 18-55mm and 55-300mm. I have the 50mm f/1.8G on order. I take a lot of family pictures, animals, Sea life, and landscape. I do not have a big budget but what would be the next lens for me to get or should I get a flash? I am loving and not sure were to go now! Please help me out!