I've been using circular polarizes and related filters for my pictures using the screw in system. I've used the step up filter ring to fit larger filters on my smaller thread lens.
I'm debating on getting the square/rectangle filter systems for Soft-edge Gradient ND filter.
I haven't use any system or know of any of them and I'm wondering if people have any recommendations for starting out?
I've seen the Lee filter system but I don't know if it is worth getting over other systems. I know that my largest thread is 77mm which is why I might get the 100mm system.