i see...
Oh, and on another note, been seeing a couple of cheap ND filters in the market recently from previously unknown brands :sweat:
I suppose there's a high chance that these'll have colour balance issues too, no? :think:
i don't know, but price doesn't always equate quality.
for example, cokin gnds versus tianya, the latter is cheaper, but has less yellow cast problems. of course, the trouble is, tianya only has one type of gnd that i know of.. about 2 stops difference maybe.. while cokin has more variety and thus more flexibility.
i think it is better to google and research a bit for lower-middle end products, see what people are saying, and even then, take that with a pinch of salt.
most of the time, high price products will be good - if you think about it, if a product is bad, but tries to charge exorbitant prices, it will die out in no time at all. but whether they are affordable for you (and there is nothing wrong if you are willling to spend on these and have the means to).. is another thing altogether.
anyways, for nd2/nd4/nd8, i don't think there is going to be very significant difference. the difference would probably come from flaring, ghosting, etc, these things will only be problematic when you shoot against direct sun or concentrated sources of light at night. beyond that, 6 stop, 8 stop, 10 stops, usually only premium brands (or decent brands) like hoya or b+w or the signature expensive brands like lee, hi-tech, singh-ray will have these, i think.
