Thanks Dan. I did see that but that says a 2MP chip while the black one is a 2.4MP chip. 

Based on the video samples they look totally different, with the 2.4MP looking so much better, and with much better colors. White housing would be a nice option for outside walls and even inside stores. Black is useful for warehouses, night clubs, etc. Though when you bring out the Dahua 2.4MP AF Eyeball style dome, wont need this in white 🙂

Also, while on topic I have some 2.4MP Dahua Auto Focus domes, and I just noticed what seems to be a design issue - a subtle bar that very slowly moves up and down the image. In fact you really cannot see it with the video, if you save a snapshot then save another 1 minute later (or longer) and flip between those 2 images, you should see this. It can be at the bottom, top, anywhere in the image.

I have gone back and saved snapshots from previous installs and low and behold, the same issue. It does not affect the other HD CVI cameras I have at the locations, and even which were on the same wire before swapping to the AF dome - eg. I first had a Manual Focus Varifocal dome, then replaced it with the AF dome. 

I can send you a webpage to check out which shows this moving bar/lines.
I'm going to bring one of the cameras home tomorrow with a CVI DVR and troubleshoot it, see if I can find out the cause. It might be some hum from the motorized lens even. I have these AF domes powered on both individually fused PSU and PTC breaker PSU, so that counts those out.

Okay so far I have found out that all installs with the AF dome have lines (plenty noise) in the image when zooming in and out, whatever is causing that also likely causes the black bar rolling up and down the image.

I have found out that it does not occur when powered from a single plug in adapter (5A tested so far, will test others).
This happens with both the 2014 and 2015 AF dome firmwares.

So it seems like either the distributed power supply does not have enough power to run these cameras, or the cameras are not grounded properly and get some sort of interference from the other cameras or even the PSU.
I have used fused power supplies as well as the PTC ones, 10A ones with 1.1 Amps each output for example - same issue regardless.

It can be a very noticeable black bar in some cases - it goes up and down the image over a period of time, sometimes going away completely for a while.
These cameras are not touching metal or anything, these can be as simple as sheetrock screws in a sheetrock ceiling, or in wood, or using plastic plugs.

Any suggestions? Without using single power supplies ofcourse 😀
That could get expensive.

I tested the amps and unless my meter does not test amps properly, it was using 160ma-260ma, the 260ma when the lens is zooming. For reference, the mini dome specified at 208ma was using 160-190ma.
Based on the specs the AF dome should be 700-800ma, but I didn't see that.

Also, I tried it on the more basic 8-channel PSU and it does not produce lines.
In fact since that PSU says on it 250ma output per channel I was surprised it even worked lol.
Although it also says fuse rated at 650ma, but again the camera is supposed to be more than that.

So now I am confused.

So far it seems only to be doing it on the 16-channel and another 8-channel PSU (they both have that metal guard over the internal parts, both 1.1a per channel, different US brand names/resellers etc, one is an old one which was already at the site).

From what I can tell the lines when zooming also come along with the rolling bar - fix one and both are gone.

I guess they could add some 5A laptop style power supplies for now just for those cameras (fit them inside the lockbox). Dont really want that extra expense now, but in the future I might suggest a separate PSU just for those AF domes.

If it were just the one location, but this happens at multiple locations.
It would be easier for you guys to do this testing though, I dont have easy access to these PSU etc now as they are installed already.
Thanks.