I refuse to believe both of these women are this clueless, she has to be being willfully obtuse. You could just go on twitch and see that's not true. They both work with cameras for multiple hours a days, multiple days a week (I'm not sure about the other lady but she appears to stream) and I'm suppose to believe neither of them has just messed around with settings to figure out how their cameras works to improve their set up or just for fun?
lol it's not only aperture FYI if anyone cared to know. Aperture increases the depth of the focused zone of the camera, but if you meant to keep everything not in focus except for the pussy lets say, you would have to turn off the face focus feature. Otherwise it will prioritize focusing on the face and then everything else is blurry. Either widen the aperture to include the pussy or remove the face focus so it can focus on her pussy and blur everything else including her face and the room. Depending on how she wants it. Sole pussy focus, or face and pussy in focus.