[Matthieu Robert]

Hi everyone.
I have an EX3 (similar to EX1 here).
I would like to know if anyone has try to do some 3d tracking with ex3’s shot.
I ve corrected the barrel distortion and off center with a Mokey calibration, but Boujou is not enable to find any good solution…

So I’m wondering if the issue came from de CMOS sensor and its rolling shutter.

thanks.

[Matthieu Robert]

Hi Darwin,

actually, the chip size is note the same as its “size name”
1/2″ is not a 1/2″ chip. It’s the size of the ring holding the chip. (it’s a historic reason).
Per exemple, a 2/3″ Scarlett chip is actually 10.1 x 5.35mm. It’s smaller than 2/3″, even if you considerate 2/3″ as the diagonal.

So based on that, a 1/2″ EX3 chip would be 7.575mm x 4,261mm

Anyway, Boujou can work without this information, unless you want to tell him the focal length.

By the way, is your EX3 chip perfectly centered ?
Mine is pretty off centered, I can clearly see it when I zoom, the center of the image is moving a bit (easy to see when you active the center mark in the LCD)

I m talking about that because the center of the perspective is very important when you do 3d tracking jobs.