Where r00t has no land

After quite a few adventures between among GND filters and while my searches did not reveal much information regarding the potential differences among the GND filters (Lee and Singh-ray I assume cannot be compared here, since they are glass filters and the quality –and price- is top notch).Since I had more spare time, I moved on performing a few tests with both filters and additionally my new whibal grey card (used for WB settings while shooting).