‘Centre focus, focus-stack, differential 1, 8s delay.’Published July 29, 2018 at 205 × 205 in Optimising Film Scans from Olympus micro 4/3 Cameras Centre focus, focus-stack, differential 1, 8s delay. ‹ Return to post Leave a comment Cancel reply Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.