The problem is, that bend is not real. Modern digital cameras use a cheap CMOS sensor to read the image. These cheap sensors mimic a rolling shutter by reading an image a line at a time. CCD sensors read the whole image at once (global shutter), but are usually limited to 30fps because of cost. High speed cameras with global shutters cost a lot of money. So, if your high speed camera cost you less than $10k, it most likely has a sensor that mimics a rolling shutter.
I used white athletic tape on the dark colored shafts. I always keep two rolls in my bag. 🙂
If you want to look into an in depth study of shaft flex and kick then I recommend this site:
Casio cameras also have a rolling shutter and skew the shafts.
See these videos for proof:
Script for language translation:
0:03 – This video was shot with a very inexpensive camera; VGA quality, 18 frames per second. Note how bad the distortion is when the club gets to the bottom of the screen. Even waggling the club causes the shaft to skew forward.
0:25 – When we turn the camera sideways, with the top of the camera pointed down range, we get a much straighter look at the shaft when it gets near the ball. However, when it gets to waist level, it is still skewed.
0:48 – Now let’s take a look as some stills. Here with the camera upright you can see alot of skew. When I turn the camera sideways and rotate the view, the shaft looks very straight. Again upright, a lot of skew, not correct. Camera sideways, just a touch of bend, this is the correct look.
1:10 – Camera upright, shaft at waist level, the shaft is correct but the club head is stretched. With the camera turned, you see a lot of skew.
1:22 – Pre-impact, a lot of forward skew. With the camera turned, you can see the shaft droop, which is the correct look, but the club head has been squished.
1:32 – Post-impact, a lot of forward skew. With the camera turned, the shaft is bent backward, this is the correct look. But again, the club head is squished.
1:47 – Note the location of the hands in each of these stills. As I get closer to the camera, the skew grows. And in the last still, the skew is extreme.
1:58 – Post-impact, from a distance the shaft doesn’t look to bad, there is some skew. But, as we get closer, the skew becomes greater and you can see the shock wave that’s in the shaft that gives it that snake like bend.
2:14 – I shot this video with the Sanyo XACTI FH1a. It shoots slow motion video. I used the 240 frames per second setting with the ISO set at 800.
2:29 – From a distance, no skew can be seen. But as we get closer, the skew becomes very obvious.
2:39 – I tested the Sanyo XACTI with 7 different golf shafts. I wanted to compare the amount of forward skew with the upright camera position, with the amount of skew that’s shown when the camera’s top is pointed down range. I took a full hard swing with every single club regardless of flex. My swing speed averages around 102 MPH (164Km/Hour). I saw very little difference in the amount of forward flex in the videos at either angle. The ladies flex clubs where very difficult to hit with a full swing.
3:16 – This is droop. This image appears to have no distortion, you can tell this because the ball mostly round. Droop will appear in the video if the camera is set up down range of the golfer and looking back at an angle. If the camera is set behind the golfer and looking forward at an angle, the droop will be completely hidden.
3:43 – Jamie Sadlowski, shown in magazine shots with a lot of skew in his shafts. Note when he’s shown on the “Konica Minolta Swing Vision” his shafts are very straight. (3:56)Same tournament, same day, amatuer camera versus Swing Vision camera.
4:02 – This hangs in the fitting booth at the local golf store. You go in for a fitting, they’ll point to the pro (professional), show how his shaft is bending forward and tell you how important your flex is. But that pro’s shaft is not really bending like that.
4:19 – So if you have a consumer type camera and you still want to be able to shoot you videos. I recommend that you turn the camera sideways and point the top of it down range, and just go ahead and shoot the videos. Take the camera home, put the videos on your computer and rotate them back upright using a video editor. And watch them that way. It’ll show you all your body positions which is the most important thing you’re looking for. The shaft will be skewed but that’s no big deal.
Thanks so much for watching, I hope you found this video useful.