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Well, I guess you had the camera on a tripod, and you had a dark ND filter on the lens, and you opened the shutter for say about 40 seconds. And started from the left and banned to the right three more times, with some kind of a cover on the lens, and when exposing you had some sort of a frame in front of the lens, and most likely fixed to the camera. Any ways the result is good, but not striking 7 |