I use Camdiox ND10's and they have no colout cast. In 72mm and 77mm about £10/£13 great for a cheap filter.
Thanks i will stick with cheapo,s for now, now i know how to get the most out of them, with WB measured,I'd agree with Martin - there are plain filters out there with minimal cast which aren't exactly expensive for 100mm squares. I reckon a better experiment would be with a single semi-ok filter for that £10-20 mark and then decide what you want to invest in (rather than 3-4 ultra cheap ones). Still, it's easy to correct by doing exactly what you say. Only some of the really bad ones have such strong casts that you lose colour - most are ok.
Grads are harder because any cast usually varies across the frame, depending on the density. That's where paying for a cast-free filter is worth it.
Yes i am using them as a learning exercise, i have been eyeing up some hoya nd'sBear in mind that cheap filters can also degrade image quality. It's a bit of a lotto
I splashed out for a Hoya ND1000, used it within an hour or so of getting it, must say i am pretty pleased with results, looking forward explore more.The SRB filters are also well priced and good quality.
It seems pretty good, I will post up a pic tonight,, first pic taken with it.Is the Hoya quiet neutral ?
Cheers.Good first attempt with ND filters and might be a good idea to paste the EXIF file so others can see what settings was used.