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<blockquote data-quote="J-see" data-source="post: 420621" data-attributes="member: 31330">Basically nothing matters but the pixels on the sensor and the amount it travels during a second. That's your required shutter speed for a perfect freeze. You need to know how long a second lasts which requires some practice if you don't. We learned that as kids by counting the seconds between lightning and thunder to calculate the distance.Once you control those two values, it's simply getting good at guessing. You can use the focal points as indicators since they have a fixed position on the sensor.The larger your subject (when zooming), the faster it'll travel and the more you crop, the more correct your shutter has to be.To add: this is under the assumption you don't add shake during exposure. When you move the lens in the wrong direction during, you can affect the distance traveled. At fast shutters it'll not make much difference but at slower shutters it does.</blockquote>

[QUOTE="J-see, post: 420621, member: 31330"] Basically nothing matters but the pixels on the sensor and the amount it travels during a second. That's your required shutter speed for a perfect freeze. You need to know how long a second lasts which requires some practice if you don't. We learned that as kids by counting the seconds between lightning and thunder to calculate the distance. Once you control those two values, it's simply getting good at guessing. You can use the focal points as indicators since they have a fixed position on the sensor. The larger your subject (when zooming), the faster it'll travel and the more you crop, the more correct your shutter has to be. To add: this is under the assumption you don't add shake during exposure. When you move the lens in the wrong direction during, you can affect the distance traveled. At fast shutters it'll not make much difference but at slower shutters it does. [/QUOTE]

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