Hi, very new photographer having just bought a Nikon D5500. I'd primarily like to take pictures of my children as they grow- a combination of portraits and candid action shots. My question is the 50mm lens better or the 35mm? I bought the 50mm 1.8g as I read great reviews about it, but when I tried using it I found the background blur a bit difficult to get adjusted to. If one of my children is sitting behind the other in a candid close up, they are blurred. Apologies for such a silly question, but can you adjust the lens to reduce background blur to make the picture more 'in-focus' overall, particularly if you want some background features to be included in the shot? Or should I have invested in a different lens altogether? Thank you.