The article does mention an intentional long exposure photographer... Michael Wesely - <a href="https://wesely.org" rel="nofollow">https://wesely.org</a><p>He has some neat multi year photographs too.<p>When I was considering the "how do you do this" (aside from reciprocity failure), the phrase "its only 3 stops from a one day exposure to a 1 week exposure..." And then you go from there.