A Couple of Rules for taking photos with a blurry background with a basic kit lens.
Do you want to get a blurry background in your photos but only have a kit lens?
Follow these simple rules and you'll be able to.
It's all about these simple things: Distance to your subject, Focal Length and Aperture.
1. Get closer to the subject with your lens that way the background will be more compressed.
2. Zoom all the way in with your kit lens. Again you'll have a better chance at getting the background blown out.
3. Shoot at the widest aperture possible and combined with the distance and focal length the better chance you have of getting that blurry background.
Go and give it a go and see what results you get.
Note: My background wasn't the best but hopefully you get the point.