The elusive Indextron

[etype2]

It's a iPad Pro 10.5. I have the ability to take it out of auto and set exposure and focus. We almost always take screenshots manually including videos. We touch and hold the LCD screen in the center of the video image and the camera reads the light of that point and locks the focus and exposure. It gives the best results. By doing this it darkens the surroundings.

For some reason, only on the one gun Indextron, we see this dark slow scan on videos and on screenshots, it's hit and miss. I can't see it on the LCD but the shot will come out dark in a portion and correctly exposed as to the remainder. Other shots will be fine, but I have to do multiple shots to be sure I catch a full exposed image. This only happens with an Indextron. Only one electron beam scanning instead of three must have something to do with it.

The frame rate for the two videos is 29.75 at 1/30 second. 4K

[old_tv_nut]

Originally Posted by etype2

We touch and hold the LCD screen in the center of the video image and the camera reads the light of that point and locks the focus and exposure. It gives the best results. By doing this it darkens the surroundings.

This is a good procedure for getting an exposure that is correct for the image, no matter how bright or dim. Since it should give correct exposure of the picture for all cases (by adjusting shutter duration), you should be able to do a quick experiment by setting the Indextron for a dim picture and see if this causes the iPad to expand the shutter time.