What I'd do is shoot with a far bigger aperture. Anything further away than a few meters is lacking sharpness. Also, lenses are at their best with handling light when you use their optimal apertures, like between f/8 and f/16. Most lenses have the distance that will be sharp displayed on the aperture ring. That way you can see how far ahead you have to focus your camera in order to get both the leaves in front of you and the trees far away perfectly sharp. So, you've made a very good shot, but your equipment can give you an even better result! :) If you don't know how to do this, you can also try to take several pictures and focus on differnt parts of the shot, and just make them into one sharp shot on your pc :) Anyway, well done!