Chaos Corona Forum
General Category => General CG Discussion => Topic started by: aaouviz on 2023-12-11, 01:16:10
-
Hi all,
I often have to camera match drone footage.
I have the metadata embedded in the picture files. I know the drone/camera is a Mavic 3 pro with a certain camera https://www.dji.com/au/mavic-3-pro/specs (https://www.dji.com/au/mavic-3-pro/specs)
The focal length is listed at 15mm, but I'm not sure how this correlates to Corona Camera settings (seeing as we have the ability to control both film width (mm) and focal length/field of view).
Is there anyone out there smarter than me that can tell me a good rule of thumb or accurate calculation I can use to ensure my Corona Camera settings properly match that of the dji drone images?
Until now I've been eye-balling it, but I'm sure there is a better way. I have uploaded a screenshot of some of the metadata.
Many, many thanks!
-
I've found the best way is to change the 'Film Width' in your Corona Camera to match the sensor size of the real camera, rather than trying to rely on converting the focal length into 35mm equivalent.
In this case, I think the DJI Mavic 3 Pro wide-angle lens uses a 17.3 x 13mm sensor - so the width is 17.3mm. If you put this in the Corona Cam as Film Width, and then use the reported 15mm focal length from your EXIF data then it should be good to go.
DJI market the lens as being approx equivalent to 28mm (in 35mm equivalent) and that looks pretty close - but notably not exactly the same which is why using the Film Width is more accurate/effective.
-
There's few similar topics in the forum, you can take a look and see if you find some useful information there.
https://forum.corona-renderer.com/index.php?topic=37789.0
https://forum.corona-renderer.com/index.php?topic=29432.0