Are filters of any use given you can do it in post?

[jujufactory]

Are filters of any use given you can do everything in post? What reason, if any, is there to use filters in front of you great piece of glass?

 

[robbz]

Everything in post?? No way... Neutral Density and Polarizing filters are two that come to mind that you cant do in post without compromising the image quality.

 

[spectrumfilms]

for sure Pola ND's and Grads are important in the field

 

[jujufactory]

If I get a Mattbox. What are the essential filters you would recommend?