SJCam 10 Pro Dual adapter ring size for the lens?

[JeffersonHogg]

Does anyone know what size of the adapter ring should be used for SJCam 10 Pro Dual to fit e.g. a larger filter?

Measuring the plastic body around the lens says about 30.5 mm - BUT a 30.5 mm adapter ring is actually far too small and does not fit at all, it seems that a fitting one should be larger by at least 2 mm if not more.... does anyone know the exact size by any chance?

 

[camuser99]

@JeffersonHogg did you ever find out what the correct size is?
I have a SJ11 and was wondering the same, as far as I can tell from the photos the SJ10 Pro Dual and the SJ11 Active should have the same body and lens size, I measured the diameter of the thread of my SJ11 and get 22mm (see photo), how did you measure your SJ10 to get 30.5mm?