Megapixel Resolutions Explained
CCTV cameras are available in different resolutions to suit different requirements, the resolution is measured in "Megapixels" or millions of pixels that the image sensor can capture. The Megapixel number is calculated by multiplying the horizontal resolution by the vertical resolution. 2 Megapixel camera has a resolution of 1920 x 1080, this gives the total of 2,073,600 pixels, this number is rounded up or down to the nearest million.
4 Megapixel cameras resolution is 2592 x 1520 = 3,939,840, slightly under 4 million pixels.
5 Megapixel camera resolution is 2560 x 1960 = 5,017,600*
8 Megapixel camera resolution is 3840 x 2160 = 8,294,400. 8 megapixel is commonly known as "4K", it is called 4K because the horizontal resolution is almost 4000 pixels wide.
*Notice how the horizontal resolution of 5 Megapixel is less than 4 Megapixel, this is because 5 Megapixel is a more square image than 4 Megapixel, 5MP is similar to older televisions it is a 4:3 ratio, modern TV's are 16:9 ratio. Having 4:3 ratio cameras gives you extra height in the image, this is perfect for cameras looking down from high up on a property as they see more area than a 16:9 camera.
Regards
Y3K Technical Support Team