Field of camera View

table of camera’s horizontal FoV

Video capacity Calculator

1TB=1024G,1GB=1024MB, this is theoretical value.For simplicity, hard drive manufacturer(like Seagate,Western Digital) define 1TB=1000GB on their HDD products and we call this manufacturer’s value. In addition, some of the listed capacity is used for formatting and other functions, and thus will not be available for data storage. So a HDD printed 1TB has only 931GB storage space […]

Depth of Field Calculator

Depth of Field Calculator

F-Stop Calculator

This F-Stop Calculator lets you compare how much more or less light on two lenses pass. This is a key factor for video surveillance camera at low light performance.