I knew there was a difference but didn't think it was this much. I like the 4mm better then the 2.8 while wider not much use on the left side or far back. I just need two 4mm and wouldn't need the PTZ.
PTZ auto track, which will zoom in for better facial identification. See the person walking in the background? I can't identify other than a man in black. But i have the 1831 on my porch and in my backyard a good addition to my surveillance arsenal.
PTZ auto track, which will zoom in for better facial identification. See the person walking in the background? I can't identify other than a man in black. But I have the 1831 on my porch and in my backyard a good addition to my surveillance arsenal.
I have a PTZ as well already and has auto track. I just use that as an overall view and don't really care about anything past the first row of cars, and for that even the HFW1831E is fine for the most part.