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Message: <blockquote data-quote="Stoshowicz" data-source="post: 369083" data-attributes="member: 31397"><p>Im impressed with your math <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> But like I said , its to demonstrate principle. But playing along, I never said how dark the background was nor how relatively bright the ball was , nor the fov of the lens , nor the distance to the ball. So those there calculations aren't valid speculations to the scenario. ( besides, I found out that the modern shutters open vertically)  And I see you must agree that the ball would be elongated ,, which was the point I was trying to illustrate. And a 42.6mph rate of motion is entirely feasible for a vertically moving birds wing.</p></blockquote><p></p>