Hi,
any advice? Should I get hard edge or soft edge GND filter? what is the different between the two? Thanks!
a hard edge gnd, has the horizon line "hard", and the soft edge gnd has the horizon line "soft"
this is so helpful i realise, so i koped some stuff from wiki
the top one's the soft edge, the bottom's one the hard edge
what is different is the scene you will use it for. for example, if you have nothing which cuts above the horizon that you want details for, e.g. something with a treeline, like upper peirce, then a hard edge would work best. for anything else, soft edge will be good.
i myself use hard edge, which gives rise to very funny halos somethines because i have to place the horizon line higher than it really is for the details i want. hopefully i'll be able to get more variety soon..
by the way it doesn't stop there. singh ray even has reverse gnd. this puts the "hardest" point at the horizon line.. good for shots where the sun is just about to disappear below the horizon.
there is also "gnd full" which means the gradient is from top to bottom. useful for certain types of scenes also , where the brightness is really gradual from top to bottom. as to what, i'm not exactly sure myself.