Thanks. I have a "Lee" brand square ND filter and a hard grad. I change then out depending on the light and the shutter speed I want. I shoot in manual mode, usually with ISO set at 100. I also do some post processing in Lightroom afterwards. I did think about learning how to use Photoshop but all that sitting to learn would eat into my photography time lol.great as usual ... may I ask, do you use for these a physical (square) GND or are you blending that in postprocessing ?