What Richard said just about summs it up for me too. With the addition of a diffusion (scattered light filter) As IMO the filter has a better effect than the software option. Also on occasion use a starburst filter. If I am in a situation that I dont need any of the above mentioned, I dont use any filters. The only exception being that I would use a UV in preference to a skylight, because I feel it is better at reducing haze (as mentioned in the filters thread) Although some prefer the skylight as it can have a slight warming effect. As far as PS/PSP goes, if you have shot unfiltered you then still have the option to have the best of both worlds in many situations.

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