View single post by Gert
 Posted: Sun Sep 3rd, 2023 18:00
Gert



Joined: Thu Apr 19th, 2012
Location: Vejle, Denmark
Posts: 48
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 When it gets darker then the 3D-tracking can be confused if there are lights overpowering the light on the subject, for instance, the car lights are the most powerful light source.
Here is an example at 1/100 f:1/5.6 ISO 7200 - keep in mind the frame rate is 30 frames per sec, that is, the camera is still on trac in less than ½ a sec.


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I found a workaround by using the "wide area AF mode", where you can customize the area size, so I created an area (with / height) matching the outline of a car and placed it on the car.
Wide area mode detects the subject - based on "AF subject detection" setting - or uses closest subject.

This made it possible to track cars until it was so dark you could barely make out the car silhouette by the naked eye.
Example ISO 25600, 1/100 sec, f:1/5.6  


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Last edited on Sun Sep 3rd, 2023 18:00 by