Phone photo

A phone camera has a sensor a few millimetres across, behind a lens equivalent to about 24mm. The frame is tiny and the lens is very wide, so the depth of field is deep. A hand held near the camera and a building far behind it are both sharp, and that alone gives the format away.

The rest is software. The phone stacks several exposures, lifts the shadows, raises the local contrast and removes noise. The noise reduction smooths fine texture, so skin, hair and fabric lose their grain and take on a slightly waxy surface. That surface is the most recognisable thing about the format, and it is the part a prompt most often forgets.

Name the optics first: a very small sensor, a very wide lens, and deep depth of field with the whole scene sharp from front to back.

Then name the processing, because that is what people recognise. Lifted shadows, high local contrast, slightly oversaturated colour, and noise reduction that smooths fine skin and fabric texture. Say smoothed rather than soft, because soft reads as blur.

Say the frame and the hold. The picture is usually upright at 4:3 or 9:16, taken at chest height, and slightly wider than the photographer meant. If you want the portrait mode blur, ask for it by name and say the cut out around the hair is imperfect.

Use it for anything that should look posted rather than published: a message, a listing, a found moment, a picture taken by somebody who was already in the room.

Leave it alone when the picture should look considered. The format says that the photographer chose nothing, and a reader hears that even when the subject is good.

Cinema publishes Deep Focus, Shallow Focus, Bokeh and 24mm Wide at /techniques/cinema/ as four separate entries. A phone gives deep focus and a 24mm view by construction, and then fakes the shallow one in software. Use the cinema entries to choose one of those on a clean picture, and use this entry when you want the whole phone.

The disposable camera is the other camera with no settings, and it fails in the opposite direction: a hard flash, a black background, heavy grain and no smoothing at all.

35mm format is the film equivalent of a general purpose camera. It carries the grain that a phone removes, it gives a 3:2 rectangle rather than an upright 4:3, and it separates the subject with optics rather than with a mask.

Cinema publishes Phone Camera at /techniques/cinema/ under format and body. That entry is phone video. This one is the still: one frame, and the processing that runs on it the moment the shutter closes.

The iPhone 4 arrived in 2010 and Instagram launched in the same year, and together they made the phone the camera that most pictures come from. Apple added HDR in iOS 4.1 in 2010, Google shipped HDR+ on the Nexus in 2014, portrait mode arrived on the iPhone 7 Plus in 2016, and Night Sight followed in 2018. Each step moved more of the picture out of the lens and into the processor, which is why a phone photograph from 2012 and one from 2024 read as two different formats.

The picture comes back with film grain, because photographic prompts pull grain in by habit. Say noise reduction that smooths fine texture, and ban film grain by name.

The background blurs optically when you wanted the phone version. Say the blur is computed, with an imperfect cut out around the hair and the edges of a hand, or drop the blur and say deep depth of field instead.