"I tried what you suggest and video quality is a bit better but not at best. Do you are anyone else have any suggestions "
We definitely need more info:
1) Camera model, Resolution, FOV
2) Distance from camera you are attempting to do an image capture with
3) Examples of image capture.
4) issues in day time or night time
In general:
Please see the DORI section of the cliff notes, I've updated the data.
Calculate the ID range from there based on your camera, and only expect reasonable image capture at the ID distance and NOT beyond that. ( beyond that range expect the image capture quality to get significantly less ).
note: sometimes cameras are shipped with plastic covering protecting the lens .. be certain to remove that.