1D AF in burst mode question.

[Andrew Ling]

While shooting in burst mode at a target moving laterally, for the most part keeping the same distance from you (such as a runner in a track meet) or shooting multiple targets which are approximately the same distance (I assume these two cases are the same AF wise), is the AF good enough to take a bunch of sharp images in burst mode? Or do you need to constantly release the shutter and refocus? If the AF good enough for conitinual focus in these instances? What about in the case of the target moving towards or away from you?

Andrew

 

[glowluzid]

If the lens can stop down and focus (canon USM does) then it can track focus and fire altogether at high burst rate, as long as the 1D is configured in the proper modes, and the shutters are at longest 1/500 (for 8fps).

 

[Stuart Rider]

Usually yes. It's not perfect, but if there's some contrast in the subject and you've got a lens with quick AF it'll track some very fast moving subjects. I often take bursts of racing cars coming towards me and it usually gets 100% focused, with the 70-200 2.8 L or 100-400 L.

A recent example :



I know they're small images, but trust me they were all in focus, and that was with a 100-400 + 1.4x which seriously reduces the AF performance.

While shooting in burst mode at a target moving laterally, for the
most part keeping the same distance from you (such as a runner in a
track meet) or shooting multiple targets which are approximately
the same distance (I assume these two cases are the same AF wise),
is the AF good enough to take a bunch of sharp images in burst
mode? Or do you need to constantly release the shutter and
refocus? If the AF good enough for conitinual focus in these
instances? What about in the case of the target moving towards or
away from you?

Andrew

--
Cheers,

Stuart Rider.

 

[rwzeitgeist]

While shooting in burst mode at a target moving laterally, for the
most part keeping the same distance from you (such as a runner in a
track meet) or shooting multiple targets which are approximately
the same distance (I assume these two cases are the same AF wise),
is the AF good enough to take a bunch of sharp images in burst
mode? Or do you need to constantly release the shutter and
refocus? If the AF good enough for conitinual focus in these
instances? What about in the case of the target moving towards or
away from you?

I routinely shoot my daughter's riding lessons, in which the participants jump horses over 2'6" and higher fences. I typically shoot bursts of 6 to 10 with the 1D set to AI Servo focusing and high speed (8fps) motor drive. The 70-200mm f2.8L keeps up with both lateral and approaching movements without removing my finger from the shutter release. The only issue I run into is maintaining the focus point on moving subject without anything else capturing the focus point by intervening. If the camera loses focus it will not fire until it regains focus, so sometimes the shutter's rat-a-tat-tat-tat will miss a beat or two, then resume.

Personal function 13 influences the camera's behavior in this situation.

Andrew

Bob

 

[Paul R Greenleaf]

oversteering monsters ain't they!

A recent example :



I know they're small images, but trust me they were all in focus,
and that was with a 100-400 + 1.4x which seriously reduces the AF
performance.

While shooting in burst mode at a target moving laterally, for the
most part keeping the same distance from you (such as a runner in a
track meet) or shooting multiple targets which are approximately
the same distance (I assume these two cases are the same AF wise),
is the AF good enough to take a bunch of sharp images in burst
mode? Or do you need to constantly release the shutter and
refocus? If the AF good enough for conitinual focus in these
instances? What about in the case of the target moving towards or
away from you?

Andrew

--
Cheers,

Stuart Rider.