I bought the PolarPro Cinema Series filter set for my Mavic Pro (ND8, ND16, ND32, ND4PL, ND8PL and ND16PL). thinking that would cover everything. However, using the ND16PL when flying over the ocean I find that on a sunny day I must set the shutter rate ~1/100 sec to avoid over exposure at 24fps. I had a PL filter that didn't rotate for my Spark, but the NDPL filters for the Mavic need to be rotated to the right position which I find very difficult. I suspect I need either and ND32PL or even ND64PL however these don’t seem to be very common and PolarPro has apparently discontinued the ND32PL. I prefer to use a polarized filter rather than a plain ND filter in all conditions because I like the saturated colors. Do I need a higher ND value or am I not rotating the plane of polarization properly?