Chas Tennis

Lives in United States Baltimore, MD, United States
Works as a Physicist
Joined on Oct 10, 2010
About me:

Now interested in high speed video for motion analysis of tennis strokes with a Casio EX-FH100.

Chas Tennis' recent activity

  • Fluorescent lights flicker at 120 cps. They fire for both the positive and negative voltage parts of the 60 cps waveform. Chas Tennis
  • The greatest effort on the eye muscles to accommodate (focus) comes from the close distance. Another approach, probably more limited,  would be to use a large computer screen and view it at a ...
  • Between about ages 40 and 50, the eye lens stiffens and the ability to change its shape and focus closer is greatly reduced. The muscles that focus the eye lose the capability to do so. Changing ...
  • I don't know much about video compression. Generally for video compression, file sizes are reduced by only saving the differences between a reference video frame and a number of the next frames. Fo ...
  • There are two worlds for video recordings - 1) video playback for entertainment where realistic or attractive videos of moving objects are desirable. = slow shutter speeds. 2) video analysis of ...
  • What are you guys talking about? I've Googled terms photography magnification rule and no finds first page. Do you have a link? Chas Tennis
  • I would like to find a few concise words to state this fact That the resolution of a moving object - that you are most interested in - is only as good as its motion blur. Something similar to the ...
  • Using a shutter speed equal to 1/2 the time between video frames for recording - as is often done for smoother appearing video playback - is a pretty poor choice given that there is so much motion ...
  • Have you received this high speed camera? Chas Tennis
  • Do you know if you want to 1) only produce attractive videos for playback at 30 fps or 2) want to analyze sports motion details also, using single frames. ? For attractive 30 fps playback, motion ...
  • Example side views of golf swings in direct sunlight: 1) Some motion blur, not much Jello Effect false club bending. https://www.youtube.com/watch?v=-sCYiLnbQJ8 2) Swing at 500 fps. (Disregard ...
  • Mortac8, Good Buddy, Taking a high speed video of a golf swing from the side is about the best test that I can think of. Motion blur and Jello Effect distortions should show well on a fast swing in ...
  • Have you tried the high speed video modes of the 100f? Chas Tennis
  • For entertainment or analysis? Stop action, single frame needed? Resolution estimate Assuming a piano has 52 white keys and you want to see them all in a frame, a resolution of 520 horizontally ...
  • I mostly take many short high speed video clips of tennis strokes using a Casio FH100 compact camera. Total 4 batteries. I have a small camera case that neatly stores a spare battery and empty SD ...
  • You have a very good point. For the application of analyzing athletic motions such as golf or tennis a fast shutter speed is essential. Casio was the only company offering affordable top ...
  • A user's manual is available from Casio Support. For high speed video and manual shutter settings the manual has this - http://support.casio.com/storage/en/manual/pdf/EN/001/EX100F_M29_FB_151116_EN.pdf
  • Replied in EX-100f
    Someone in another thread just bought a Casio Ex 100f and said that it had manual shutter. A user's manual is available from Casio Support. " Using BEST SHOT Use the procedure below to shoot a High ...
  • What frame rates are available in high speed video mode? What are the faster shutter speeds in high speed video modes? How long does the camera record in high speed video mode? Chas Tennis
  • Check the the total recording time in high speed video mode on the Sony cameras. Chas Tennis
Activity older than 12 months is not displayed.
Chas Tennis has not added any gear yet.
Total messages 744
Threads started 57
Last post 2 days ago
Total comments 0
Total likes 0
Total reviews 0
Entries 0
Votes cast 0
Photos uploaded 444
Last upload 10 months ago