Pictures taken in burst mode on 7D using 24-105/15-85mm

Hi,

I just got my refurb 7D from Canon. So far, the camera is great. Can anyone share and post some pictures using 24-105 or 15-85mm in the burst mode? Still evaluating the two lenses to get?

thanks,

what are you trying to find out?

I want to find out which lens has a better focusing in burst mode and in normal single shot mode.

I have used both...but tend to shoot with the 24-105 since I am shooting drifters, and really dont want to get hit.

The focus isn't going to change in burst shooting as long as you're stationary.

Do you mean AF tracking? I.E- AI Servo?

I think you need to understand High Speed Continuous better in terms of how the camera prioritizes shooting in this mode.

Especially considering the 7D's handling of this is different than the XXD's ever did it, and unless I'm mistaken, the 1D's did it until the MkIV.

Bare with me, because this will sound a bit complicated and unnecessary, but understanding of this may be of help to not just you but others.

Canon handles (or should I say handled?) High Speed Continuous ("burst mode") with the following caveat... it depends on the AF mode. If you're in ONE SHOT mode, the camera will lock focus on the first shot and then leave AF alone and fire off as many as you like till the buffer is full... mind you AT FULL FRAME RATE - so for the 7D, @ 8fps. If you're in AI SERVO mode, the camera will wait for AF lock on every frame before tripping the shutter, if the AF is slow on the lens it will NOT be able to achieve 8fps in AI SERVO with High Speed Continuous motor mode - with non-RingUSM lenses the best I've seen achieved in High Speed Continuous barely scratches the surface of Regular Continuous' (which is supposed to be 3fps) frame rate.

Before you ask, not all USM's or even RingUSM's are the same speed. In my experience, the L's are faster. My 70-200 f/4L IS USM was (until the new 70-200 f/2.8L IS II USM found its way into my life) the only lens I've encountered that has been able to shoot full 8fps with my 7D in High Speed Continuous and AI SERVO... for other lenses I relied on ONE SHOT + High Speed Continuous to keep up with frame rate. My EF-S 17-55mm f/2.8 IS USM is almost as fast but not quite. My EF 100mm f/2.8 Macro USM can track about as fast as the 70-200L's as well. The EF 50mm f/1.4 USM, which is a micro-USM can not get the full frame rate, neither can the EF 28-135IS's I own.

Now for the good news. The 7D was built for speed and sports shooting. And they added a special C.Fn to handle this very important camera function - C.Fn III-2.

C.FnIII: Autofocus/Drive
AI Servo 1st/2nd img priority

0: AF priority/Tracking priority
1: AF priority/Drive speed priority
2: Release/Drive speed priority
3: Release/Tracking priority

What does it mean? and which should you use?

For me this decision was based on my lenses and their ability to run in AI SERVO at full speed (THANK YOU, Canon L!!!!!) so I leave it at at the 0 setting. Because the lenses lock fast and tracking is my main concern... with the faster ring-USM motors it can handle the job of tracking @ full 8fps and not lose frame rate. When dealing with slower focusing motors you then need to decide WHAT is more important... keeping up the frame rate or getting focus locked before each shot. When frame rate is your goal, use either 1 or 2. The difference between these two is this... setting 1 makes sure the first shot has AF lock, setting 2 just wants to shoot regardless of lock or not. Setting 3 I don't quite understand, its main priority is to take a shot whether AF locked or not, but THEN it cares about Tracking... that one I can't figure out.

As far as which would be faster the 24-105L or the 15-85IS? Dunno. But one things for sure, understanding how the camera prioritizes burst shooting and playing with C.Fn III-2 will get you the best results.

Alan
Great explanation.

I try, I try.

Very interesting. Thanks for the info.

Hi, i have tried both the 24-105 and 15-85. In my experience, the 15-85 focuses a tad bit faster and it also a little more decisive, maybe because it is a newer lens. But the speed difference is very little n your experience with both lenses will be about the same, except that the L is weather sealed and has a longer reach.

nureality wrote in post #11643030
I think you need to understand High Speed Continuous better in terms of how the camera prioritizes shooting in this mode.

Especially considering the 7D's handling of this is different than the XXD's ever did it, and unless I'm mistaken, the 1D's did it until the MkIV.

Bare with me, because this will sound a bit complicated and unnecessary, but understanding of this may be of help to not just you but others.

Canon handles (or should I say handled?) High Speed Continuous ("burst mode") with the following caveat... it depends on the AF mode. If you're in ONE SHOT mode, the camera will lock focus on the first shot and then leave AF alone and fire off as many as you like till the buffer is full... mind you AT FULL FRAME RATE - so for the 7D, @ 8fps. If you're in AI SERVO mode, the camera will wait for AF lock on every frame before tripping the shutter, if the AF is slow on the lens it will NOT be able to achieve 8fps in AI SERVO with High Speed Continuous motor mode - with non-RingUSM lenses the best I've seen achieved in High Speed Continuous barely scratches the surface of Regular Continuous' (which is supposed to be 3fps) frame rate.

Before you ask, not all USM's or even RingUSM's are the same speed. In my experience, the L's are faster. My 70-200 f/4L IS USM was (until the new 70-200 f/2.8L IS II USM found its way into my life) the only lens I've encountered that has been able to shoot full 8fps with my 7D in High Speed Continuous and AI SERVO... for other lenses I relied on ONE SHOT + High Speed Continuous to keep up with frame rate. My EF-S 17-55mm f/2.8 IS USM is almost as fast but not quite. My EF 100mm f/2.8 Macro USM can track about as fast as the 70-200L's as well. The EF 50mm f/1.4 USM, which is a micro-USM can not get the full frame rate, neither can the EF 28-135IS's I own.

Now for the good news. The 7D was built for speed and sports shooting. And they added a special C.Fn to handle this very important camera function - C.Fn III-2.

C.FnIII: Autofocus/Drive
AI Servo 1st/2nd img priority

0: AF priority/Tracking priority
1: AF priority/Drive speed priority
2: Release/Drive speed priority
3: Release/Tracking priority

What does it mean? and which should you use?

For me this decision was based on my lenses and their ability to run in AI SERVO at full speed (THANK YOU, Canon L!!!!!) so I leave it at at the 0 setting. Because the lenses lock fast and tracking is my main concern... with the faster ring-USM motors it can handle the job of tracking @ full 8fps and not lose frame rate. When dealing with slower focusing motors you then need to decide WHAT is more important... keeping up the frame rate or getting focus locked before each shot. When frame rate is your goal, use either 1 or 2. The difference between these two is this... setting 1 makes sure the first shot has AF lock, setting 2 just wants to shoot regardless of lock or not. Setting 3 I don't quite understand, its main priority is to take a shot whether AF locked or not, but THEN it cares about Tracking... that one I can't figure out.

As far as which would be faster the 24-105L or the 15-85IS? Dunno. But one things for sure, understanding how the camera prioritizes burst shooting and playing with C.Fn III-2 will get you the best results.

thanks for the information. Going to try it.

nureality wrote in post #11643030
Canon handles (or should I say handled?) High Speed Continuous ("burst mode") with the following caveat... it depends on the AF mode. If you're in ONE SHOT mode, the camera will lock focus on the first shot and then leave AF alone and fire off as many as you like till the buffer is full... mind you AT FULL FRAME RATE - so for the 7D, @ 8fps. If you're in AI SERVO mode, the camera will wait for AF lock on every frame before tripping the shutter, if the AF is slow on the lens it will NOT be able to achieve 8fps in AI SERVO with High Speed Continuous motor mode

I believe this is incorrect, AF lock occurs with One Shot mode but not AI Servo.

From Canon:
　

QuickGuide to EOS 7D Autofocus Modes

AF SHOOTING MODE OPTIONS
One Shot AF
In this mode the AF system is set to focus on a stationary object. Once the system has confirmed sharp focus, a half-press on the shutter button will lock focus. You can then re-compose (if you wish) before you release the shutter.
AI Servo AF
In this mode the AF system is set to detect a moving subject, focus on it, and maintain focus as you release the shutter. This mode is ideal for subjects moving in three-dimensional space; that is, toward or away from the camera.