Record­ing movies

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two as­pects of movie record­ing that are eas­ily con­fused are frame rate and shut­ter speed. But while the frame rate sets the record­ing speed, the shut­ter speed de­ter­mines how long each frame is ex­posed to light. Fast shut­ter speeds can make mov­ing ob­jects ap­pear well de­fined but ‘jit­tery’, while slow shut­ter speeds can pro­duce smoother mo­tion, at the risk of mov­ing sub­jects ap­pear­ing blurred. The best com­pro­mise is to set a shut­ter speed that’s dou­ble the frame rate – so 1/60 sec for a frame rate of 30fps.

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