The traditional photograph is made by allowing light to enter a camera through a glass lens where it strikes photosensitive film and registers an image. The image is developed into a negative that is used to transfer the image to photographic paper. The paper is developed in chemical baths to produce the positive image of the finished photograph.
A photograph may be printed in black-and-white or in color. In the contemporary period, photography has evolved to include new electronic technologies to produce, for example, digital photographs with filmless cameras.