when trying to figure out what I want to capture at locations a good field of view calculator would come in handy, has anyone found a good one for either IOS or android? Also I ran across this online one which is simple and seems to work perfectly https://www.pelco.com/partners/tools-calculators/camera-lens-field-of-view-calculator-fov but the one thing I want to make sure of is the describe it as a lens format for the sensor would that be a 1:1 ratio to a 1/3" sensor?