There are a few things to point out in this picture, first thing, depth of field, this picture makes the mushroom the main focus, whilst the background is blurred. Also, we can see the texture inside of the mushroom. I like this picture the most it is zoomed in, and the texture is smooth.
I like in this picture colours and couple shadow. The composition is not the best, but I could improve it and e.g. crop the picture. However, I think that there is too much red/orange colour. Anyway I like here composition of shadows and light. I think I could shoot something similar like this using my camera and 50mm lens.