DCist will be at the Hirshhorn Museum and Scultpure Garden this Thurs. night at 7 p.m. (book signing starts at 6 p.m.) to hear celebrated Japanese photographer Hiroshi Sugimoto give an artist lecture about his new exhibition at the Museum, a retrospective of his 30-year career, which opens the same day. Sugimoto is well known for his attempts to convey a sense of time in his still photography, like in his Theatre series (5th Avenue…