Some commercial photographers, and some amateurs interested in artistic photography, have been resistant to using digital rather than film cameras because they believe that the image quality available from a digital camera is still inferior to that available from a film camera, and the quality of images taken on medium format film is near-impossible to match at any price with a digital camera. Other commercial photographers, and many amateurs, have enthusiastically embraced digital photography because they believe that its flexibility and lower long-term costs outweigh its initial price disadvantages. 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. When it comes to taking quality photographs, you need to know what lenses you should use, and when you need to use them. "One picture is worth a thousand words," which has an interesting basis in the history of photography. Modern digital cameras have comparable noise/grain at the same ISO as film cameras. The commercial photographic world could include Advertising photography. These are photographs made to illustrate and usually sell a service or product. 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. There are photography articles and guides. 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.