https://pho.tography.org/tags/ef-70-200mm/ Recent content in ef 70-200mm on pho.tography.org Hugo -- gohugo.io en-us Sun, 03 May 2026 00:00:00 +0000 https://pho.tography.org/second-curtain-sync-ef-70-200mm-f/2.8l-is-iii-with-flash/ Sun, 03 May 2026 00:00:00 +0000 https://pho.tography.org/second-curtain-sync-ef-70-200mm-f/2.8l-is-iii-with-flash/ First curtain sync fires the flash at the beginning of the exposure. Second curtain sync fires it at the end. The difference, on a stationary subject in a dark room, is invisible. The difference, on a moving subject with any ambient light at a shutter speed slower than 1/60s, is the difference between a motion blur that trails behind the subject and one that leads in front of it. The first looks like the subject is moving backward.