Image update rate of PX4Flow on Mission Planner

I am using PX4FLow optical flow camera in my quad. I was calibrating the focus and found that the image update rate is slow in both QGC and Mission Planner. As the sensor sends update rate at 250 Hz, what is the image update rate in Mission Planner?

The problem: I am finding image quality fine but the readings are erroneous, hence I need some clarity over the image update rate in the GCS.


the focus image rate is only like 4hz, and is only designed for the focus screen. during normal running its much faster