I am the proud owner of a D3100, I LOVE the camera but I have a few questions. I am looking at buying some filters-they have quite a few on amazon.com, they are different sizes (52, 58 ect) what size do I need ? I have the 18-55 lens the 35mm and the 55-200..also I was at a inside party and used the "p" mode with the 35 mm lens and the pics came out blurry and looking like they had a "green tint"........any suggestions, I appericate your help