If you have a knack for photography, and enjoy doing it, then you might want to think about using your hobby as a way to make some extra money for yourself. Photography can also be viewed as a commercial and artistic endeavor. At the highest-end, some digital cameras are nothing but a sophisticated light-sensing unit. Instant cameras and commercial film development at reasonable prices helped cameras become a part of almost every household. Modern digital cameras have comparable noise/grain at the same ISO as film cameras. Even after color film was readily available, black-and-white photography continued to dominate for decades, due to its lower cost and its "classic" photographic look. Fine art photography includes photographs made to fulfill a vision, and reproduced to be sold directly to the customer. Landscape photography are photographs of different locations often made to be sold to tourists as prints or postcards. There are photography articles and guides. The aesthetics of photography is a matter that continues to be discussed regularly, especially in artistic circles. Currently digital photography, disposable cameras and even camera-phones continue to make photography part of our lives. Fashion photography emphasizes the clothes or product, glamour emphasizes the model. Photojournalism can be considered a subset of editorial photography. Digital photography has also been adopted by many amateur snapshot photographers, who take advantage of the convenience of the form when sending images by email, placing them on the World Wide Web, or displaying them in digital picture frames.