Hello forum, this will be my first post and was looking for some help. I am interested in the expodisc to help with white balance. I've looked at the web site and watched the tutorials. I usually take more landscape pictures than portraits and can't always get a metering from the light source (based on how they explain to use it). How's does the expodisc work if you can't take a metering from where the subject matter is(landscapes) and how well does it work this way? (Or is more suited for portraits?) Thanks for your help!