Us­ing the en­tire fo­cus range of your lenses can some­times prove to be a dis­ad­van­tage

Digital Photograper - - Techniques -

On longer tele­photo lenses and macro op­tics, where the range of pos­si­ble fo­cus varies from sev­eral cen­time­tres from the cam­era to many me­tres, it can take time for the fo­cus­ing sys­tem to read­just the lens el­e­ments to the cor­rect po­si­tions. This of­ten leads to fo­cus ‘hunt­ing’ and po­ten­tially missed or de-fo­cused frames. Try us­ing your lens’ fo­cus lim­it­ing switch to re­strict lens move­ment to only a por­tion of the full track, thereby speed­ing up aut­o­fo­cus func­tion­ing.

When you know your sub­ject will be within the range of feet rather than me­tres, there is lit­tle need to al­low the lens to fo­cus all the way to in­fin­ity, so se­lect the nar­rower range un­til your fo­cal point moves fur­ther away.

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