Dahua HDCVI Ultra Series - OSD Exposure Settings

[ermac]

Hi, I have a couple of the Dahua Ultra Series HAC-HFW3231E-Z cameras. In the camera's OSD's "Main Menu" under "Exposure" there are the following menu items:

• Exposure Mode. I have set it to "Auto" and then turned "Low motion blur" on (this should in fact increase the shutter speed if I am not mistaken?), with the following settings:
  • "Shutter max" is set to 33 (the highest it will go)
  • "Shutter min" is set to 01 (the lowest it will go).
• Exposure Level: 12
• Gain: 8
• Slow Shutter (default is off), I have changed this setting to either "X2", "X4", "X8", "X16" or "X32" as well as setting it back to "Off".

On the Slow Shutter setting I have noticed no visible change in the image in any way as a far as my eyes can tell, both on the live stream and on recorded video playback. I have also not noticed any increase or decrease in motion blur using this setting.

Does anyone know what this Slow Shutter setting actually does?

(As a side note, to give some context, this camera is facing the street, so capturing crisp fast moving objects is important).

 

[bigredfish]

I have a few of those and keep the exposure level at about 10, Gain at 6.
I also use Auto and low motion blur settings as you and get pretty good images from them. I keep one in forced color at night and one I let go to B&W/IR.

In theory slow shutter would be the opposite of what you want, keeping the shutter open longer. Like you, I played with it and saw no real difference, I leave it off. It could be a result of interacting with some other setting. I also use the "Standard Scene" setting.

(Switch to 1080p)

 

[ermac]

Thanks Bigredfish, might as well keep the slow shutter off then. Also use the the "standard scene 1" setting and on some cams use the "low light scene" setting - low light scene is excellent especially in the evening, but find it produces more motion blur during the day.

BTW, excellent night time footage on starlight mode, looks great, and a lot of police activity at 1AM
Is that camera lens set at 2.8mm or have you zoomed it in?

 

[bigredfish]

Its zoomed a smidge, Im guessing 3.6-4mm

That particular night the neighborhood drunk got a bit frisky and had to spend the night in the County lockup to sleep it off...

Obviously the benefit of mounting lower, say 6'-7' is that you get good depth of field. While the action is at about 75-90' I still get fairly good detail out there, but the camera is focused on my vehicles..