relatively new to my D7500, so excuse the potential newbie question.
I was using this last night indoors, with flash popped up, and noticed that in A mode the aperture was 3.5 (focal length 100mm).
However, with exactly the same framing, focal length, lighting, and flash popped up, in P mode the aperture was 5.6 (and I could not increase it).
This occurred in a number of indoor lighting conditions.
I was wondering why this might be? And whether it's possible to get the aperture to 3.5?