Wikipedia , Digital Photography 20 Bullets . 2nd Mariah Franco

1. Digital photography uses an array of electronic photodetectors to capture the image focused by the lens, as opposed to an exposure on photographic film
2. Many camera phones and most digital cameras use memory cards having flash memory to store image data
3. The primary advantage of consumer-level digital cameras versus film cameras is that digital cameras eliminate the need to purchase photographic film
4. Disadvantages of consumer-level digital cameras versus higher-level digital cameras include the fact that the sensor size
5. Immediate image review and deletion is possible; lighting and composition can be assessed immediately, which ultimately conserves storage space
6. Noise in a digital camera's image is remarkably similar to film grain in a film camera
7. Digital cameras have decimated the film photography industry through declining use of film rolls and development chemicals previously required to develop the photos
8. Film and prints can fade, but digital images can potentially last unchanged forever
9. Many digital sensors have less dynamic range than color print film
10. Another disadvantage of the video modes of digital cameras, is the image-stability function does not operate while the subject is being filmed
11. Another advantage is almost every digital camera has a video mode, and the most recent digital still cameras offer video mode with HD capability
12. Digital photography has also been adopted by many amateur snapshot photographers
13. Memory cards allow for vast numbers of photos to be taken, requiring attention only when the memory card has exhausted its free space
14. The quality of a digital image is a composite of various factors, many of which are similar to those of film cameras
15. The two main types of sensors are charge-coupled devices in which the photocharge is shifted to a central charge-to-voltage converter, and CMOS or active pixel sensors
16. The first true digital camera that recorded images as a computerized file was likely the Fuji DS-1P of 1988
17. Nearly all digital cameras use built-in and/or removable solid state flash memory
18. High dynamic range imaging (HDR) addresses this problem by increasing the dynamic range of images by either increasing the dynamic range of the image sensor
19. Aliasing may add patterns to images that do not exist and would not appear in film
20. Previously digital cameras had a longer start-up delay compared to film cameras, i.e., the delay from when they are turned on until they are ready to take the first shot, but this is no longer the case for modern digital cameras with start-up times under 1/4 second 0.15 seconds for the Nikon D90