My sister recently sent me a photograph of her daughter (my niece) with her new baby son, born in lockdown. The picture is a general view of mother and daughter in the garden, surrounded by the usual trappings of being outside on a sunny afternoon. It's just a regular picture, reasonably well exposed and exhibiting full depth of field. Out of curiosity I had a look at the exif data and was amazed to see that the exposure parameters were as follows: Apple iPhone f/1.8 1/1114 sec ISO-20 Focal length 4mm As a long time user of SLR & DSLR cameras, those exposure details don't make any sense. How on earth could there be any depth of field at all? And yet the picture looks like a regular shot that I might have taken with my own camera using ISO-200, f/8.0, 1/250 sec. I have no acquaintance with phone cameras, so is this merely one of the quirks of their technology?