Exposure: Range or Fixed? Which is better?

[bigredfish]

I dont use use BI or the Day/Night utility. It gets its focus by itself while there's still light.

Lots of things come into play - Speed, Angle, Shadows, IR, Focus obviously.

Here's a example of what I'm fighting daytime. Mostly shadows and angle. The brighter the sun and more pronounced the shadows the tougher it gets
Same car, 3 frames- last one is best

 

[Ri22o]

This is my LPR that faces NNE.

 

[bigredfish]

Nice.

I do think my shadows with the tree are my biggest problem.

 

[bigredfish]

It also helps if they’re black letters on white background the way God intended it

 

[bigredfish]

Is that a 5241Z12?

 

[OICU2]

What are you guys using at night for LPR?

 

[MikeLud1]

Below are my daytime exposure settings and daytime image.

 

[Ri22o]

Is that a 5241Z12?

Yea, not the S2

 

[Ri22o]

What are you guys using at night for LPR?

I still need to work on my night settings. I think our printed plates are screwing me.

 

[OICU2]

One of my biggest issues for my two LPR cams is I have a tree directly in view of each that causes focus issues.

 

[OICU2]

And then we have.... snow.

 

[CanCuba]

0-4ms during the day

1/120 at night due to my LED runway lights harmonizing with the 60hz AC frequency

 

[bigredfish]

^^^^^^^
I think broadly speaking this is a good rule of thumb starting point for most.

Then it’s a matter of pushing it a little more to find that point where the noise or lack of brightness becomes greater than the benefit of a faster shutter/more gain

Ambient light plays a big role in how far you can go