I have a Nikon d7000 and I often shoot in Aperture mode. Sometimes, when I turn the aperture wheel, the aperture doesn't change. I have to mid-press the shutter button and then only, I can change the aperture.
Is it normal? How to avoid this behaviour (like if the camera was entering into a kind of "sleeping mode")?
Thank for your answers
PS: I looked in the manual but didn't find something related to that.