Big­ger Sen­sors, Blur­rier Back­grounds

HWM (Malaysia) - - LAB TEST -

A mo­bile phone might ad­ver­tise that it comes with a large aper­ture lens, like an f/2, which means that the aper­ture (think of it like the eyelid of the lens) can open wide. But un­like a large aper­ture lens on a DSLR cam­era, which can pro­vide more ap­par­ent back­ground blur – also known as bokeh – it’s near im­pos­si­ble to get the same ef­fect on a mo­bile phone.

This is be­cause depth of field is af­fected by mag­ni­fi­ca­tion, so the larger the sen­sor, the more the back­ground can be blurred, lead­ing to that dreamy outof-fo­cus look in por­traits. This is why it’s dif­fi­cult to achieve the same ef­fect with smart­phones, which have small sen­sors.

But wide aper­ture lenses are also known as fast lenses, be­cause they help the sen­sor cap­ture more light at slower shut­ter speeds by let­ting more light in. So while that f/2 lens might not get you dreamy bokeh, it will help you shoot at faster speeds in low-light, re­duc­ing the chances of cam­era blur.

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