DavidP wrote:
True. DUCKS might fly around you at constant radius.
Sort of.
Now imagine a special case of this model where a duck or a goose is at a very large distance from you. Also imagine that the bird trajectory is a tangent on your original panning circle. Although the duck flies in a straight line, small sections of his flight path approximate your panning arc....again, because the panning circle radius (i.e., distance to target) is so large.
What that really means is that in finite sections of duck's flight, your camera AF system will not perceive any changes of focus distance, as if the duck was flying in a circle. Which all really boils down to this very useful and practical information for all BIF shooters concerned with the Servo AF performance of their cameras: photograph your targets while they fly in the greatest possible distance.....that way you can use "One Shot AF" mode with good focusing accuracy, and you don't have to be held hostage to Canon's Servo AF shenanigans.
PetKal wrote:
Sort of.
Now imagine a special case of this model where a duck or a goose is at a very large distance from you. Also imagine that the bird trajectory is a tangent on your original panning circle. Although the duck flies in a straight line, small sections of his flight path approximate your panning arc....again, because the panning circle radius (i.e., distance to target) is so large.
What that really means is that in finite sections of duck's flight, your camera AF system will not perceive any changes of focus distance, as if the duck was flying in a circle. Which all really boils down to this very useful and practical information for all BIF shooters concerned with the Servo AF performance of their cameras: photograph your targets while they fly in the greatest possible distance.....that way you can use "One Shot AF" mode with good focusing accuracy, and you don't have to be held hostage to Canon's Servo AF shenanigans. ...Show more →
True, grasshoppa, but said duck might be too far away to even be seen with the naked eye in order to avoid the "Canon Servo AF Shenanigan circle-of-error."
PetKal wrote: photograph your targets while they fly in the greatest possible distance.....that way you can use "One Shot AF" mode with good focusing accuracy, and you don't have to be held hostage to Canon's Servo AF shenanigans.
Well, I tend to lose track of the bird anyway, so I have to continually re-start the focus manually in the first place.
PetKal wrote:
Paul, true enough, however, if you go to the other extreme scenario of the model, not only that the Servo AF system will probably let you down, but you also expose yourself to the scrutiny of every internet expert and photography neophyte who are as a rule extremely quick to observe that your focus placement on the bird's eye is less than perfect.
PetKal wrote:
Paul, true enough, however, if you go to the other extreme scenario of the model, not only that the Servo AF system will probably let you down, but you also expose yourself to the scrutiny of every internet expert and photography neophyte who are as a rule extremely quick to observe that your focus placement on the bird's eye is less than perfect.
I agree (though Servo works pretty well for me, "parallel plane" or otherwise. ) Fantastic pigeon shot, BTW. You are the bird master.
