I'm getting into fashion photography and headshots for actors.. I have a few questions with the 50mm f/1.8 lenses. 1. When I take pictures using the viewfinder instead of Live View, does it automatically focus the picture for me? 2. When I take pictures using Live View, do I have to focus using the lens ring? 3. Does the 50mm f/1.8 have zoom? If not, is it only for close up shots? 4. Whats a good lens that has good bokeh, and can produce wide aperture images like the 50mm but CAN zoom? 5. What lenses do you recommend for fashion photography? Any questions answered will be very much appreciated!