What is the difference between monitoring cameras CCD1 / 3 and 1/4?
The bigger the CCD is, the better. There are now 1 inch, 2/3 inch, 1/2 inch, 1/3 inch, 1/4 inch. 3.6MM lens distance of about 8 meters 6MM lens distance of about 15 meters 8MM lens distance of about 25 meters 12MM lens distance of about 35 meters is the larger the lens, you can see farther things, but see the face very little difference is 1 / 3 lens of the light through the small aperture
Only 1/3 inch, 2/3 of the lens through the aperture of 2/3 inch, so under the same lighting conditions, 2/3 lens allows more light through, thus indirectly enhance the camera's illumination, ? 16MM of the small perspective, according to far, 8MM lens perspective, according to the relative, relatively speaking, the principle of record: the greater the number, according to the more distant, the smaller the angle; the smaller the number, The more widely
CCD chip has developed a variety of sizes: the current use of the majority of the chip 1/3 "and 1/4". In the purchase, especially when the camera angle is more stringent requirements, CCD target surface size, CCD and lens with the situation will directly affect the size of the field of view and image clarity. 1 inch - target size is wide 12.7mm * high 9.6mm, diagonal 16mm. 2/3 inch - target size is wide 8.8mm * high 6.6mm, diagonal 11mm. 1/2 inch - target size is wide 6.4mm * height 4.8mm, diagonal 8mm. 1/3 inch - target size is wide 4.8mm * high 3.6mm, diagonal 6mm. 1/4 inch - target size is wide 3.2mm * height 2.4mm, diagonal 4mm.
