Yes, you need or at least want filters in the digital photography age. Some people say you
Singh-Ray Filters
only need a polarizer, as that can’t be done in post. As Peter Hill illustrates, filters still and probably will always have a place in photography.
The Ultimate Guide to Neutral Density Filters
I have always wanted one of the variable ND filters to give me flexibility for me shots. However, they’ve notorious for color casts and weird polarizer effects. Not good, especially after I spend $400 on something.
However, the discussion on Hoya’s 9 stop filter made me finally throw the switch and purchase on at B&H Photo out of New York. They’re one of the only safe, reputable houses to purchase photography gear from, aside from Adorama & Amazon.
This 9 stop filter will allow me to take 1 second long shots in the middle of the day – something I’ve wanted to do for some time but, without a filter, on a digital camera, was not able to.
Note – if the price is too good to be true, far below the market, it probably is.