Speed Booster effect on motion tracking

I’m tracking an object in a static shot.

4/3rds camera.

Crop factor is 1.31 in the UHD mode.

The Speed Booster is .7x.

The lens is 50mm.

What should I set in motion tracking for my lens / sensor size?


3840x2160 8bit int
23.987 fps
Camera: Panasonic DMC-GH4

Lens Adapter: Metabones Speed Booster M43 (converts APS-C size to M43 size 0.7x multiplier)

Lens: Carl Zeiss ZE 50/1.4
f-stop: f1.8
Shutter: 1/50th second
ISO: 400

If you are getting an APS-C field of view then you want to use 1.6 multiplier. There is a preset for APS-C in the imaging presets, like a Canon 550D.

I’m still not sure what to do…

My sensor size is 14.425 mm wide. Would I use that number, and then multiply my 50mm lens by 1.31 and .7? (80.50mm?)

The multiplier conforms the sensor to regular 35mm which is known as full frame in digital sensors. Your adaptor has created a Super 35 or APS C size so the 50mm x 1.6 = 80mm

Thanks! It looked like an 85mm lens to begin with.