Canon Community Canon Community
 


Reply
Highlighted
New Contributor
Posts: 2
Registered: ‎04-28-2018

Continuous AF?

I have the 7D II and shoot wildlife photos. Any reason that I shouldn't have the AF on Continuous? Thanks and love this site!

Highlighted
VIP
Posts: 10,590
Registered: ‎08-13-2015

Re: Continuous AF?


@UnityStickwrote:

I have the 7D II and shoot wildlife photos. Any reason that I shouldn't have the AF on Continuous? Thanks and love this site!


I am not sure what you mean by “AF on Continuous.”  You seem to be conflating two concepts, or settings.

 

Aside from exposure settings, there are basically two settings that alter how the camera behaves at the most basic level.  One is the AF mode autofocusing system, and the is Drive Mode for the shutter system.

 

Let’s start with Drive Mode.   You can set the camera for a single shot, or for continuous shooting for as long as you fully press the shutter release button.  In addition, most camera bodies allow you to adjust the speed of continuous shooting.  Many also have a “quiet mode”, which decreases the amount noise created by “mirror slap”.  There is more to it, but the rest is not immediately relevant.

The AF mode has two basic settings, One Shot and AI Servo.  These are two very different focusing settings, for which most users apply very different AF point selections.  Most users will use just a single AF point, usuallythe center AF point, for One Shot mode.  This is useful for stationary subjects, or relatively so.  Most users enable all AF points for AI Servo mode.  AI Servo is most useful for focus tracking on subjects whose distance to the camera is constantly changing, not just moving side to side.

 

Which setting is best to use depends upon a given shooting scenario.  For instance, I use AI Servo focusing, with all AF points active, and Continuous shooting drive mode when I am looking to capture birds in flight.  I use One Shot mode, with just the center AF point active, when I am trying to focus on a bird sitting on a branch, in the midst of other branches.

----------------------------------------------------------------------------------------------------------------------------------------------------------

"Doctor told me to get out and walk, so I bought a Canon."
Highlighted
New Contributor
Posts: 2
Registered: ‎04-28-2018

Re: Continuous AF?

 

Thanks for your timely response and helpful suggestions. Here, specifically is the setting and options on the Canon 7D Mark II:

 

54E383EB-246B-47E9-88BE-F56AE077B508.jpeg

Highlighted
VIP
Posts: 10,590
Registered: ‎08-13-2015

Re: Continuous AF?

Ah!  That menu screen is for adjusting the “Live View” shooting mode.  You can see the name of this menu screen the upper right part of the screen.  Generally, you do not want to use LV for photographing wildlife.

 

Live View uses a focusing system that is separate from the one used by the viewfinder.  The LV focusing system uses the actual image sensor for focusing, which results in a system that is much slower than the dedicated AF sensor used by the viewfinder.

 

The viewfinder has two focusing modes, One Shot and AI Servo.  One Shot mode causes the lens to lock focus at whichever AF point is active, and then go idle.  AI Servo causes the lens to lock focus on an active AF point, and then continue focusing one whatever subject is being found at the active AF point.

The setting that you are asking about serves a similar purpose for the Live View focusing system.  It switches between “one shot” focusing and continuous focusing, when the camera is used in Live View mode.  

 

Again, Live View mode is not intended to use for action photography, such as wildlife photography.  All of this information is contained in the camera’s Instruction Manual, which can be downloaded from Canon Support.  Your camera is quite complex, far more complicated than a cell phone.  You will get the most out of the camera if you read the instruction manual.

----------------------------------------------------------------------------------------------------------------------------------------------------------

"Doctor told me to get out and walk, so I bought a Canon."
Highlighted
VIP
Posts: 13,184
Registered: ‎12-07-2012

Re: Continuous AF?

Are you meaning AI-servo mode or LV ?  The two focusing modes are not the same.  The kind of shooting I do mostly, LV is useless so I don't use AF on continuous.  I do use AI-servo but even then it has its good and bad.  You need to know what works.

EOS 1DX and 1D Mk IV and several lenses!
powered by Lithium

LIKE US on Facebook FOLLOW US on Twitter WATCH US on YouTube CONNECT WITH US on Linkedin WATCH US on Vimeo FOLLOW US on Instagram SHOP CANON at the Canon Online Store
© Canon U.S.A., Inc.   |    Terms of Use   |    Privacy Statement