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Message: <blockquote data-quote="Felisek" data-source="post: 425177" data-attributes="member: 23887">Oh, I missed the "set camera to program" bit. Now I understand was Don was saying. I think he meant taking pictures hand-held, and hence a minimum of about 1/500 s for a 300-mm lens. I was talking about blurring due to Earth's rotation (the Moon moves in the sky and if your shutter speed is too long it will be blurred).If you do use a tripod and remote control to remove all camera shake, than the only shutter speed limit is the Earth's rotation. This is probably about 1/100 s, but it depends on the magnification (focal length) and the amount of details you want to see.But of course, without a tripod you'd need faster shutter speeds. And you can still take successful  pictures! I should probably have said "a tripod helps" instead of "is a must".</blockquote>