1DX af cases 3-4-5 w/2.8 300mm IS USM II - Setting 3 w/IS

Started Apr 1, 2014 | Discussions thread
fpix Regular Member • Posts: 335
Re: 1DX af cases 3-4-5 w/2.8 30g0mm IS USM II - Setting 3 w/IS


Just some notes after quickly reading this topic, A little bit tough, but I hope you will not be angry.

  • Case 5 AF makes no sense with Center AF point only. Case 5 has "AF pt auto switching" at 1 (0..2), but since you have only one AF point activated there is nothing to be switched... With only Center AF activated Case 5 = Case 1. This is valid when the user does not alter the default settings of each Case.
  • Spot AF is not recommended to be used in action photography when you usually are in AI Servo. RTFM! Your camera deserves it
  • The Tracking sensitivity setting is about how quickly the camera reacts when a new object suddenly obstructs the active focus point. -2 if you want the camera to react with maximum delay ("camera, please don't change focus!") till +2 ("camera, please do change focus asap!"). You may change pertinent Case or adjust this setting depending of what you expect to see in the viewfinder.
  • The "Accel./decel. tracking" refers to subjects which accelerate decelerate more (2) or less (0). Remember, this is more about subjects coming to the camera or getting away from it. Because if subject accelerates / decelerates parallel to the camera you usually track it and thus you may end having only low accel/decel subjects in the viewfinder. Again, you may change pertinent Case or adjust this setting depending of what you expect to see in the viewfinder.
  • Shooting above f/5,6 you do NOT loose any AF, nor cross, double-cross or not-cross. I will let you study why.

This being said, to get those very nice shots (congrats!) I would start with Zone AF 1+4 or 1+8 in AI-Servo with Case 6, maybe tweaking Tracking sensitivity towards lower end. Other tweaks may be necessary depending on field situation. It is hard to "measure" which is best. Just look carefully in the viewfinder during focusing and you will observe how the camera tracks the subject; further tweaks may be needed until you reach optimum result.

But anyhow, you have very nice shots on your site, which means at least your camera is performing stellar With any Case.

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Canon EF 135mm F2L USM Canon EF 16-35mm F4L IS USM Canon EF 100-400mm F4.5-5.6L IS II Canon PowerShot G11 Canon EOS 5D Mark III +3 more
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