I guess it is finally overcoming the illusion that there is an independent "outside".
I agree with Frank, that meditation can be very much a way to remove duality and learn to rest in non-duality.
The OP (original poster) put the word “Contemplative” in the title and “Mindfulness” in the body of his text. Contemplation, generally, is not considered the same as mindfulness. I responded to the “Mindfullness” part of it, since that is more directly connected to various types of actual meditation I work with. Getting in a contemplative mood while out in nature is something I do too, but my mixing of photography and meditation is more deliberate than just contemplation.
The type of meditation that I mix with my photography is called Vipassana or “Insight Meditation,” and it took me some real training to learn it. Its traditional attributes include great clarity and also lucidity, which are connate, meaning that these qualities are like two sides of the same coin.
The process of looking through a clear lens at a flower or small diorama suggests a subject/object relationship, like “I’m looking through the lens at a flower,” but in actuality the beauty of the meditation technique is not just the object being looked at, but the looking itself. In other words, the “Seeing” is not so much about what is seen, as it is resting in the “seeing” itself, if that makes sense.
Here is another image taken today with the Nikon D810, El Nikkor APO 105mm, and using Zerene Stacker in post. Done on the Cambo Actus.