The Video Camera
Optical viewfinders removes an image from the lens line by means of a half-prism. For optical viewfinders, the images are focused by means of a split-field range finder. The range is adjusted until the split image in the measuring prism combines to form one image. This method works very well if a sharp edge is found with the measuring prism and an attempt is made to line up the vertical edges.
Digital Video Cameras are the lastest in technolgy. Digital Video Cameras still have the two main video system components. These components are the viewfinder and the lens system. In addition, large format digital video cameras use digital cassettes which are larger than video 8 tape and can store up to five hours. Mini digital video uses small
cassette tapes which can store at least sixty minutes. The tapes are not compatible with VHS camcorders and when copied across there is a loss of
quality. Some use the firewire digital output socket giving data transfer rates of 12-50 Mbps. Most models have a lens range of 4.5-45mm. The advantages of digital video cameras are the ability to transmit data without interference and its able to manipulate data using DSP. However, the disadvantages are large volumes of data produced and it results in a need for increased bandwidth.
Sources:
--Lanzendorf, Peter.The Video Taping Handbook.Harmony Books.1983
--Digital Video Cameras
