Woodland photography is an interesting and challenging sub-genre of landscape work that requires a bit of a different approach in order to create successful images. If you would like to improve your forest photos, check out this fantastic video tutorial that features an experienced landscape photographer discussing some helpful advice for taking better landscape images.
Coming to you from Steve O'Nions, this awesome video tutorial will show you some helpful advice for and examples of woodland photography. The challenge of woodland photography is finding a clean composition. With tree trunks, branches, brush, and way more all criss-crossing in every direction, finding a logical and easily digestible composition is not particularly easy. One of the best things you can do is either use a longer focal length or get closer to everything. Doing this allows you to reduce the number of things in the frame and thus, its complexity, and in doing so, you might be able to find a compelling composition that would not be workable otherwise. Check out the video above for the full rundown from O'Nions.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."