I understand the d600 doesnt allow video exposure adjustent (aperture) on the fly when using the command dial but i was wondering why cant i adjust it via the lens aperture ring? When i try it shows me fEE. And it will work only with the smallest aperture closed. I can adjust iso and Sutter but i though there was a way by using older non gilded lenses. Any help appreciated. Btw im also looking for a backup camera for dslr work and was wondering if the d7100 is the same way where u cant adjust the aperture in live view like with the d600? Thank u.