Table 1.

Comparison of parameters from in air and in water calibrations for two GoPro Hero4 camera used in HD video mode.

Camera	GoPro Hero4 #1			GoPro Hero4 #2
Parameter	In Air	In Water	Ratio	In Air	In Water	Ratio
PPx (mm)	0.080	0.071	0.88	−0.032	−0.059	1.82
PPy (mm)	−0.066	−0.085	1.27	−0.143	−0.171	1.20
PD (mm)	3.676	4.922	1.34	3.658	4.898	1.34
Affinity	−6.74E−03	−6.71E−03	1.00	−6.74E−03	−6.84E−03	1.01