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Message: <blockquote data-quote="J-see" data-source="post: 420609" data-attributes="member: 31330">It's pretty hard to calculate the required shutter unless the distance and speed is always identical. You basically need to know how far the plane travels on your sensor in a second and then it's that 1 second divided by the amount of pixels the subject travels. That will be a perfect freeze shutter-wise.You can guess based upon what you see in the viewfinder and then you know the minimum shutter required. If it travels 1/4th of the sensor horizontally in that second, you'd need at least 1/1500s. If you crop less, you can get away with some pixel blur.By panning, you can lower the required shutter since you lower the amount of pixels traveled during the shot.</blockquote>