Teklock

Thank you so much! This is the one i went ahead and ordered. http://store.immediasys.com/3-3-11mm-1-2-5-f1-4-cs-mount-ir-corrected-dc-auto-iris-mpl33-11ai

Can someone point me where I can source a couple of lens for a 5MP Dahua HF3500? It seems this camera has a 1/2" sensor and most of the lens i'm finding are for 1/3". What will I see if I put a 1/3" lens on a 1/2" camera?

Do you know if there is any performance difference between them?

Can anyone tell me the difference between the 52xx, 54xx and 58xx model NVRs? I know the 52 is 1 U the 54xx is 1.5U and the 58xx is 2U, but is there anything else?