Getting One ND Filter. Which One?
I enjoy landscape photography with my 24-105mm f4L (on 5D2) (77mm thread) and Sigma 12-24 II (which wont accept any filters), and I am interested in getting my first ND filter for blurring motion (water) on bright days. I tried the ProMaster variable ND (2 to 8 stop) filter, but found I am losing too much sharpness.
If I were to purchase only one non-variable ND filter, which one is recommended (brand and number of stops) by the community here?