Newbie begging for some help. So I finally made the leap and purchased a dSLR camera. I have the Nikon d3100 which I like and I'm trying to learn how to do more than just point and shoot. Anyway I took a entry photo workshop and I'm having a bit of difficulty and was wondering if you guys could give me some suggestions. Anyway, I'm learning about Aperature. If I understand this correctly a smaller F stop# will give me less depth of field and blur the background, while a larger F stop # (smaller aperature) will give me sharper images. problem is I tried it and don't notice any difference. This is F5.6 This is F36 I don't see any difference. both cases I was focusing on the middle tree.