Hey! I recently bought the iPhone 15pro and when I use the „focus“ in the camera App by tapping with my finger on the screen a „f“ appears in the corner. I can activate it, but I can’t find out what for. It looks like the sign for „camera aperture“ (I don’t know if this is the right word, it’s „Blende“ in German). What does it do? I didn’t find anything on the apple help pages.
Think of it as the control of background blur (bokeh). The smaller the number, the higher the blur. Play around with it to see the effect. Personally I like higher f-stops (less blur)--it looks more natural.