So for the first millisecond the aperture is open, then for the next 7.3 milliseconds it is shut and then it opens again. Let’s think of it another way 1/1000 second is one millisecond and 1/120-second is 8.3 milliseconds. What this means is that the camera aperture will stay open for 1/1000 sec at the beginning of every picture and the camera will then wait the rest of the 1/120 second to take the next picture. We can separately set the shutter speed to say 1/1000 sec while still filming at 120 fps. At this rate the club head will still appear to be blurry and hard to see. If you film at 120 fps and don’t set the shutter then your effective shutter speed is the same as the frame rate, i.e. Frame rate is how many pictures (or frames) the camera is taking every second they are two different things. Just a quick note to explain the difference between shutter speed and frame rate shutter speed is the time that the camera shutter is open between each picture that is taken. Film at either 120 or 240 fps and make sure you set the shutter speed to at least 1/1000 second. Here’s how to do it.įirstly you need to have a good quality clear video of the swing. The Kinovea software has this conversion built in so it makes it really easy. This gives you much more information around the impact zone!Ĭalculating timing from high-speed video is simply counting the number of frames between events and then doing the appropriate math to turn frames into seconds. At this frame rate the club head will have only moved about 7.5 inches between pictures (150/240 feet). So you don’t get much information around the impact zone! If you are filming at 240 fps you have eight times more pictures to look at. So if you are filming at 30 frames per second, the club moves about 5 feet (i.e. For example, in a 100 mph drive the club head is moving at about 150 feet per second. The extra frames you get from these high speeds provide you with a higher timing resolution and hence help you to be much more accurate than standard 30 fps video in your timing calculations. I would suggest this as a minimum you could also use 240 fps. I will use video that I filmed at 120 frames per second (fps). If you don’t have the Kinovea software download it now from and follow along with this tutorial. In this article I will show you how to measure the timing of the backswing, downswing and follow through plus use this information to calculate backswing to downswing tempo. If you have a high frame rate video camera such as the Casio FH100, and video analysis software such as the free software from Kinovea, it becomes very easy to make direct measurements from video. The TPI 3D Touring Pro Ranges for these swing phases.Ī fast swing is 750ms back and 250ms down a slow swing is 900ms back and 300ms down (where ms means milliseconds). How to calculate timing of backswing, downswing and follow through from high-speed video. The difference between camera frame rate and shutter speed. This is especially true when they don't have a good lie.Īll this will make it take longer to play 9 holes.Measuring the Timing of the Golf Swing from Video If the bunker is deep, a lot of players will take multiple attempts to get the ball out again. Getting both in and out of a bunker has its challenges, and raking the bunker - which you should be doing - isn't going to make your play faster. Then there are the bunkers to contend with, which can be more problematic than any water hazard, to say the least. When this happens, it can soon cause delays, and if several members in the group suffer a similar fate, the time lost will quickly mount up to be considerable. Then they can decide to take a drop close to the water or hit another tee shot to make up for it. When you hit a water hazard, the pace of play slows down somewhat considerably because first the player must ensure that their shot cannot be played by being certain that the golf ball did indeed land in the water. While it's an often-overlooked factor, the more bunkers and water on any golf course, the more chance of your ball going into them. The more obstacles in the way, the more time it will take to complete the course, thus extending the pace of play.
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