The following was taken on Portra 160
And the results can be had very easily from an Epson V750 (these were drum scanned but I can do them on an Epson for comparison if anyone is interested).
From my experience, you don't need to filter neg for colour. As for gradding, I'm starting to put grad over a scene occasionally as, although it isn't needed, it can improve the tonality if you want to darken the sky a lot in post processing. If you are happy with your skies to look naturally light then no need at all. In general, I would use a 1.5 stops less grad than needed for tranny - hence for most shots it probably isn't necessary but when you have a continuos tone sky that is very bright (sunset on a fairly cloudless day) then I think a grad can help - I use a soft instead of a hard generally too to preserve the transition across the horizon.
Tim
