To capture sharp, detailed close-up images, you need to focus with pinpoint accuracy and carefully consider the depth of field. While there will be occasions when you want to use a shallow zone of focus to capture more arty results, in most situations, you will want to maximize – or even artificially extend – depth of field, to ensure your subject is acceptably sharp throughout. However, the depth of field appears to grow progressively shallower as magnification is increased – if you are working anywhere close to 1:1 (life-size), you will notice that even at smaller f/stops, the zone of focus is limited. There is no leeway for sloppy technique or poor focusing.
Some kind of firm support will help you focus precisely, but not all macro subjects will allow you to set up a tripod close by and so you will often have to work handheld. You might assume that autofocus is your best bet, but AF can struggle to lock on to macro subjects and sometimes switching to manual focusing is the better option. Our tips will help you overcome the challenges of working at higher magnifications and successfully control your focus.
