Step by step Ac­ti­vate the aut­o­fo­cus

There are a num­ber of ways to start the aut­o­fo­cus ball rolling on a dig­i­tal cam­era

Digital Camera World - - CAMERA COLLEGE -

Shut­ter re­lease

The de­fault way to trig­ger the aut­o­fo­cus is by a half-press of the shut­ter re­lease but­ton. If the aut­o­fo­cus mode is set to One Shot or Sin­gle Shot AF, the fo­cus will stay locked in as long as you keep the shut­ter pressed half­way down.

Back but­ton

One or more but­tons on the rear of an SLR can be con­fig­ured to ac­ti­vate or de­ac­ti­vate aut­o­fo­cus. Be­ing able to start and stop it independently of fir­ing the shut­ter al­lows you to ef­fec­tively switch be­tween con­tin­u­ous fo­cus and sin­gle shot aut­o­fo­cus.

Touch­screen

Some cam­eras have a touch­sen­si­tive dis­play, al­low­ing you to tap on the area of the pic­ture of you want to fo­cus on. This is just as ef­fec­tive for shoot­ing movies as well as stills, al­low­ing you to achieve cin­e­matic ‘fo­cus pulls’ by tap­ping on dif­fer­ent ob­jects.

Re­mote re­lease

Us­ing a wired or wire­less re­lease al­lows you to trig­ger the aut­o­fo­cus with­out touch­ing the cam­era. If your cam­era is Wi-Fi en­abled, then you can also op­er­ate it us­ing the man­u­fac­turer’s app on a mo­bile iOS or An­droid de­vice.

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