I read the post "Best settings for isolating objects" where you suggest the buy of Nikon 35mm f/1.8G or Nikon 50mm f/1.8G. What is their differences? What can each lens give you that the other cannot? I tried to zoom to 55mm and rotated the smaller command dial to set my aperture, but, the subject in front was blurred and the background was clear (indoor, lights on, flash on, manual focus, -i set on the lens, switch to M, ISO auto, shutter auto). What was I doing wrong? If I was outside in the morning would I get different results? Since I can afford only one more lens, which one from the two mentioned above should I get? Thanks in advance!