although I am not as professional as you, I do know the picture you took is great. by using 11/23 is quiet adventure since it is a wide-angle zoom. if we try to focus on one subject, we have to abandon others to achieve our goal. the background will be so vague. and, I found out it is an art! I am not sure if my English is clear enough to make sense, so I attached the picture I took. thanks!