Wikipedia Notes

•  The first recorded attempt at building a digital camera was in 1975 by Steven Sasso
• The two main types of sensors are charge-coupled devices and CMOS or active pixel sensors
• Digital cameras can take pictures, record sound and video and used as a webcam
• The majority of professional news photographers capture their image with digital cameras\
• Almost all of the cost of digital photography is capital cost
• Digital cameras require batteries that need to be recharged or replaced frequently
• Digital cameras eliminate the need to purchase photographic film
• Image review, deletion, lighting and composition can be assessed immediately
• Many digital sensors have less dynamic range than color print film
• When highlights burn out, they burn to white without details
• Some digital cameras do exhibit a pattern in the digital  noise that is not found on film
• Digital cameras have decimated the film photography industry through declining use of film rolls
• Nearly all digital cameras use built-in and/or removable solid state flash memory
• A digital memory device is used for storing images, which may be transferred to a computer later
• Resolution in pixels is not the only measure of image quality
•  The number of pixels n for a given maximum resolution is the product *n* = *w × h*
• The pixel count quoted by manufacturers can be misleading as it may not be the number of full-color pixels 
• Practical imaging systems, digital and film, have a limited "dynamic range"
• "Highlight burn-out" of digital sensors can be abrupt, and highlight detail may be lost
• Memory cards allow for vast numbers of photos to be taken, requiring