B52IR-Z12E-S2 iris setting - depth-of-focus?

[Dr Dan]

Hello,
I am trying to set up my B52IR-Z12E-S2 (from Andy) to get the right depth-of-focus at night. Some plates come out OK, others are completely blurred. Things work well during the day, and I did focus the camera on a stopped car at night, so I suspect it's a depth-of-focus issue? Currently my exposure is set to 1/2000 , iris is set to 85 - is it too high, too low or the reason mat be different? Can provide screenshots and captures, if helpful.
Thanks.

 

[wittaj]

Pics are good.

Keep in mind that the more you zoom, the smaller the focus circle is. In my field of view, the focus number is a 20 point spread stopping a plate at left, center, and right, so you have to find the compromise balance.

Or it could be a bad setting and the camera isn't using your night focus.

Yes a high iris will reduce the focus area, so good to run it as low as you can

 

[bigredfish]

As mentioned by @wittaj cut Iris back to 50-60 max

When you zoom, your depth of field reduces accordingly. Like him, focused tightly to about a car length, I see focus range of about 10 points over approx 20-25ft of distance from when the car enters the view until it leaves due to the angle.