Focussing is not an issue with good lighting. The real problem is with depth of field. Depth of field is low with f/1. 9 aperture lens used in selfie camera so that on taking groupfies, some persons will be out of focus and blurred. In my experience, front camera has no focussing issue under well lit conditiins even if you stretch your hand. But it struggles a lot in low to medium light and the pic turn to be very soft with a little details.
... View more