I understand for portraits using a shallow DOF is nice because it can help blur out the background. My question howerver is; in a studio or a plain room with the absence of a background to blur, why would one decide to use a shallow DOF such as F2.8 or F4? Wouldn't F8 enable the subject to be fairly sharp all over? Isn't this the desired effect? Why would you want hair or the edges of the subject to be softer than along the focus plain?
Thanks
Thanks