HikVision manual change focus and focal length
How to change focal length and focus on manual varifocal lens. HikVision DS-2CD2642FWD-IS
4MP 1/3" CMOS / 20(P)/20(N)fps @ 2688x1520
Color 0.01Lux @F1.2/3D-DNR/WDR
TrueDay&Night/ IR Distance 30m / IP67
DC12V, 7.5W MAX / PoE(802.3af)