Same here, but it can be an issue with a GND as only the dark bit gets the colour cast, so correcting is a bit trickier.
Z is 4"x6" filters (same size as Lee and Singh-Ray), and thus you don't get vignetting from the filter holder on an ultra-wide lens. P series is smaller (ummm, don't have the measurements handy). As such, it's fine for most lenses until you get to the 10-20mm range (or 16mm on FF) with the multi-holder.
I see. Yeah, at this stage I'm just looking for flat grey, not graduated so that should be ok to deal with in RAW conversion. The Z series gets rather expensive from the look of it.
Think I'll check out Madsens tomorrow. He was talking me into a Cokin system last time I was in there. I should have got one because it would have worked out cheaper in the long run.
Oh dear... another spending spree?






