Top tip: Use back button focusing to make focusing a breeze


You probably already know that autofocus and Triggertrap Mobile don't play nicely together. For most of the things you can shoot with Triggertrap Mobile manual focus is key. But occasionally you'll find yourself longing for autofocus. Of course you can set the camera's AF on, get focus and then turn it off, but that's a bit of a pain. There is a solution to this problem; back button focus.

What is back button focusing?

Back button focus takes the autofocus function from the shutter button and assigns it to a button on the back of the camera, handy eh! On most cameras there is an AF-ON or an AF/AE-L button to which the focusing can be assigned.

On a Nikon D810 you can assign the AF-ON button, on other cameras you'll only have the AE-L button.

On a Nikon D810 you can assign the AF-ON button, on other cameras you'll only have the AE-L button.

How do I turn this on?

Most cameras have this function buried somewhere in their menus, it might take a bit of digging around to find it. To help you out, if you shoot with Canon or Nikon cameras, take a look here. For all other manufacturers, a quick Google search should reveal how to set up back button focusing. When you're changing the settings, make sure you have it set so that it is back button focusing only.

Right, it's set, now what?

Using back button focus with Triggertrap Mobile is really simple. Once you’ve set it up, keep the autofocus switched to your the setting of your choice, then use the AF-ON (or AE-L) button to activate the autofocus. It really is as simple as that! The cool bit is as the focusing has been taken away from the shutter release, Triggertrap Mobile will interact as if the camera is on manual focus.

What can I do with this?

The neat bit about back button focusing is that you can use it in place of manual focus for most techniques. Occasionally you'll find that manual focus will be easier to use, particularly for macro shots.

This smashing shot was captured using the Sound Sensor mode in Triggertrap Mobile to fire a flash. We used back button focus to get the focus where it needed to be and the result, much like the shards of glass flying all over the place, is rather sharp!

This smashing shot was captured using the Sound Sensor mode in Triggertrap Mobile to fire a flash. We used back button focus to get the focus where it needed to be and the result, much like the shards of glass flying all over the place, is rather sharp!

Share your shots with us!

As always, we'd love to see what you guys come up with. If you use this handy technique, we'd love to see your shots! Well, even if you don't we'd still like to see your shots! You can tag us #Triggertrap and @Triggertrap on Twitter, Instagram, and Facebook. Don't forget you can also add your photos to the Triggertrap pool on Flickr.

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