Golf swing video? at DVinfo.net

Scott Gold · April 20th, 2005, 11:28 AM

Hey folks,
I was wondering what settings to shoot with to capture the most information in analyzing a golf swing. Is there anyway to increase the number of frames captured per second? Will setting the shutter speed to something higher give me more information when trying to capture a fast swing?
Thanks,

Scott

Dylan Couper · April 20th, 2005, 11:45 AM

Hi
You can't increase the frame rate, but a higher shutter speed will give you a crisper, sharper picture of the swing. Go as high as you can for the light you have. Golf swings are so fast you'll rarely have more than a few frames though.

Ming Dong · April 20th, 2005, 11:54 AM

What is the tradeoff when shooting with high shutter speeds?
Does the GL2 turn up the gain? If so, is there an indicator to let you know?

Nick Jushchyshyn · April 20th, 2005, 01:35 PM

If you put the GL2 into manual mode, you can control the settings yourself.
First, put as much light on the subject as you possibly can.
Then, open the iris as much as possible, (lowest f stop value)
Next, set the exposure gain as high as you will tollorate. (Note, for motion analysis, noise from gain isn't really a big deal since your not after a "pretty picture" as much as knowing where all the action is)

Finally, crank up the shutter speed as high as you can while still getting a good image of your subject. If you max out the shutter speed and the image is still bright (from all the light in step one) then you can ease off some of the extra exposure gain.

One final note, is that you should shoot interlaced, then slow the clip down to 50% or slower, using an NLE that will de-interlace the frames into seperate images. This should give you 60 unique images per second (assuming NTSC) vs 30 interlaced or 30 "full frame" images from the camera.

Hope this helps.

April 20th, 2005, 11:28 AM	#1
Scott Gold Regular Crew Join Date: Jul 2003 Location: Irvine, CA Posts: 194	Golf swing video? Hey folks, I was wondering what settings to shoot with to capture the most information in analyzing a golf swing. Is there anyway to increase the number of frames captured per second? Will setting the shutter speed to something higher give me more information when trying to capture a fast swing? Thanks, Scott

April 20th, 2005, 11:45 AM	#2
Dylan Couper Wrangler Join Date: Jun 2002 Location: Vancouver, British Columbia Posts: 8,314	Hi You can't increase the frame rate, but a higher shutter speed will give you a crisper, sharper picture of the swing. Go as high as you can for the light you have. Golf swings are so fast you'll rarely have more than a few frames though. __________________ Need to rent camera gear in Vancouver BC? Check me out at camerarentalsvancouver.com

April 20th, 2005, 11:54 AM	#3
Ming Dong Regular Crew Join Date: Jan 2004 Location: Silicon Valley Posts: 92	What is the tradeoff when shooting with high shutter speeds? Does the GL2 turn up the gain? If so, is there an indicator to let you know?

April 20th, 2005, 01:35 PM	#4
Nick Jushchyshyn Major Player Join Date: Feb 2004 Location: Philadelphia, PA, USA Posts: 548	If you put the GL2 into manual mode, you can control the settings yourself. First, put as much light on the subject as you possibly can. Then, open the iris as much as possible, (lowest f stop value) Next, set the exposure gain as high as you will tollorate. (Note, for motion analysis, noise from gain isn't really a big deal since your not after a "pretty picture" as much as knowing where all the action is) Finally, crank up the shutter speed as high as you can while still getting a good image of your subject. If you max out the shutter speed and the image is still bright (from all the light in step one) then you can ease off some of the extra exposure gain. One final note, is that you should shoot interlaced, then slow the clip down to 50% or slower, using an NLE that will de-interlace the frames into seperate images. This should give you 60 unique images per second (assuming NTSC) vs 30 interlaced or 30 "full frame" images from the camera. Hope this helps.