These lens is not 4, but 3mm, with apperture 2.8mm (my measurement), which mean f1:1.1 which is fantastic. Apperture of varifocal 2.8 - 12 at 3mm is 1.6mm.
With AGC 55 & without slow shutter picture have 2much noise.
Picture at full moon, AGC 51, Slow Shuter at Low 7f/s 720p
You can see me...