I'm going to be taking outdoor portraits (unpaid) next week and was hoping to get some advice. Are there any filters that are recommended for this situation? It's going to be evening (around 6-6:30PM) and in a lightly shaded area. There will be dense trees/foliage behind the subjects and their backs will be to the sun (but the sun will be behind the trees). Not ideal, I know, but I can't change the location. If you need more info, let me know. I'm freaking out. Thanks.