Customised Range - shutter speed - not intuitive

I have several 5442 cameras and I'm now fine-tuning all of them. I'm trying to understand when making a change to a customised range from 0 - 4, to 1 - 4, and no changes to any other settings why the resulting video image deteriorates.

My understanding is, that a range of 0 - 4 ms is a range of very fast > 1/2000 to a nothing slower than 1/250. The zero figure, in my mind, is a nonsense figure.

So I thought I would fine tune things and restrict the fastest shutter speed to 1/1000, therefore setting the customised range to 1 - 4 ms. After this change, the image washes out. The following are the settings and images relevant.



The above settings ( 0 - 4 ms ) produces the following image (video feed):



Change settings:



The above settings produce the following image:




I simply don't understand what is going on. No other changes were made. Am I missing something obvious?

Unfortunately, grabbing snapshots from Blue Iris, there is no metadata to indicate shutter, aperture etc.

I would say that limiting the fastest speed to 1ms is too slow for that much light. Try .5 or leave it at 0.

I struggled with the customized range, too, and am still fooling around with it from time to time always looking for an even better setting.

The 0 represents the fastest shutter speed for the camera (most dahua's are 1/100,000), so with your shutter speed of 1, you are running a 1/1,000 shutter and thus it is washed out as you need a faster shutter - and for daytime with all the light color in the image, I would knock the gain down as well to help darken the image some. At least that helps on my cam with a similar situation.

My understanding is that on dull days the camera would struggle to even stay at 1/1000 (1 ms) and would probably fall back to slower speeds, say 1/250 (4 ms). So I see this as a semi-auto feature and therefore other settings, gain (I'm assuming that's ISO) , aperture (not that I can see a setting for that) must change if there is a change in shutter speed.

I did fiddle with other settings, Exposure Compensation, Gain and Brightness but was unable to get an acceptable picture, not even close.

Ok, now time to consider shutter priority either at 1/000 or 1/500 for daytime use.

Slowly working things out. Under Shutter Priority, you can also apply a customised shutter speed range but there is no option to enter any gain values. So, under this method the gain is automatically altered accordingly. When selecting manual mode, the gain values can be entered in a range, so effectively is the same as shutter priority but you could restrict it more so than under shutter priority.



I do have an interest in photography, I'm a Nikon DSLR shooter, so I am trying to correspond the settings to what I know. I shoot sports, so I understand the necessity of fast shutter speeds and when shooting events early in the mornings, for fast shutter speeds the ISO (gain) has to be bumped up.