Hey guys.. thanks for insight on this. I don't have a whole lot experiance using these filter. I live in New Mexico , and boy does the sun shine here a lot of days in the year. It's nice to know that I can have something in my bag to have a fighting chance on getting a good looking photo depite trying to pitch the optomal time of the day to customers (which they never listen too.) I'm wanting to get a 39mm ND6 or 8 for my Rollei.