By default, the focus is the way we lock by pressing the shutter button halfway. But actually there is one feature that is more commonly used pro photographers to lock focus, namely by using the AF-ON button. Techniques focus with this button named "back button focus" because it utilizes the existing buttons in the back, not the front of the shutter button.
What's back button focus?
Back button focus is autotokus features by utilizing a specific button on the back of the camera, usually is the AF-ON button or (*) and typically squeezed with the right thumb. If your DSLR camera behind there is a button with the inscription AF-ON, then this technique can be used directly with ease. If there is no do not worry, you can still perform engineering focus back button to perform a special setting in the camera menu settings.
What are the advantages of using the techniques focus back button?
The main advantage autofocus with AF-ON button is that we no longer need to squeeze the shutter button halfway. Simply by pressing the AF-ON button with the thumb to start to lock the autofocus and then we could do a re-composition (recompose) when shooting a stationary object or tracking when shooting moving objects. If it is okay and wanted to take photos, live we press the shutter button fully without releasing the AF-ON button.
Back button focus is very useful when we use continuous autofocus mode or tracking moving objects and when we do recompose. When using continuous mode and by utilizing the back button focusing, we can liberate the shutter button to lock focus on the obligation. If you often shoot in continuous mode, must have experienced an incident where we want to lock the focus, but what happened instead focus button-push full pitch until the camera takes photos accidentally.
Some scenarios where the focus is very handy back button
Here are a few scenarios where the use of the back button shooting focus will greatly help smooth the process. Here's just a sample:
When photographing small children are constantly moving, or when shooting sports. we can minimize the time delay between pressing the shutter halfway and the time of exposure. Simply press the AF-ON by the thumbs to lock the focus and exposure immediately take the index finger
When the photo portraits of people who only pose little change between the images with photos. You can take pictures very quickly without the hassle of selecting new focal point
In situations where the camera confused to choose the focus. For example, when photographing a tiger behind a wire fence iron, sometimes confused and chose to focus the camera on the fence and not on the tiger. With our focus back button can lock the focus on the new tiger did re composition
When we want a very sharp images. By pressing the shutter button halfway and hold to lock the focus, the camera will shift the weight forward, so the stability is reduced and consequently more susceptible photo blur. These techniques overcome back button
How do I use the back button focus in Canon DSLR cameras
For high-end cameras such as the Canon 5D mark III, 6D or 7D Mark II AF-On button is available. To activate techniques focus back button fully, we need to do is turn off the autofocus function on the shutter button. How: go to the Custom Function menu >> 2 >> Custom Control. Here you can change the function of the shutter button Metering and AF start to Metering Only.
For the Canon camera AF-ON button is not available, we can use the asterisk button (*) or AE-L button to be the AF-ON button. Flow of settings on the camera menu more or less like this:
Position wheel on the operating mode of the PSAM do salsh Auto so that we can enter into Custom Controls.
Click on the Menu button and use the Main Dial to select Custom Controls, and then select the option called "Shutter / AE Lock Button". From here the choice will vary depending on the camera, which touched sdiingat is the number before the slash indicates the shutter button while the number after the slash indicates the button asterisk (*) or AE-Lock.
In essence you want to change the combination function Shutter button / AE-Lock into Metering start / Meter + AF Start
How do I use the back button focus in the Nikon DSLR camera
The Nikon camera that has provided the AF-On the back, is easy enough to mengaktikan back button focus. Go to Menu and then enter the Custom Setting Menu (pencil icon), then to the autofocus. Look for AF activation and select the AF-On. Click on OK to activate. This makes the shutter button on the camera only served to take photos, while the task of locking the focal point submitted to the AF-On button.
For Nikon DSLR cameras without AF-On button on the back, we need to assign another key roles behind to replace the AF-On. Go to the Menu and then Settings Custom Controls. Select Assign AE-L / AF-L button and then scroll down to the AF-ON, then press OK. Now the AE-L / AF-L is behind already changed into the AF-On until you can use the back button focusng techniques.
What about the other cameras? please go to the official manual camera, if the term back button focus can not be found can be found with the term autoofocus lock.
How it feels weird?
Because you are so accustomed to using techniques push the shutter button halfway to lock the focus, then it is a powerful memory formed in the muscle, consequently need at least a few days to make the technique back button focus new habits. Try it in many different situations.
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