Just an update:
I compared the 3.6mm fixed camera in this review (
IPC-B5442T-ASE 4MP Starlight+ fixed 3.6mm bullet)
to the Vari-Focus version (
HFW5442E-ZE)
The fixed lens has better min. illumination specs and it seems to hold true.
IPC-B5442T-ASE (Fixed) Minimum Illumination 0.001 Lux@F1.6
HFW5442E-ZE (VF) Minimum Illumination 0.002 Lux@F1.8
As expected, the fixed 3.6mm lens performed better capturing more light which is clearly seen in the images below.Captures are 13 seconds apart.
Cameras are literally stacked 1/2" apart, same exact settings; 1/30, Gain 55, DNR50, Defog-Auto.
Variable Focus -HFW5442E-ZE
Fixed 3.6mm IPC-B5442T-ASE