Yes, low-end DSLRs can get you nice photos. But it depends a lot on the photographer, not just the camera.
The main thing to keep in mind for blurry backgrounds is the ratio between two distances:
- camera to the point of focus; and
- camera to background.
The further the background relative to the subject, the blurrerblurrier the background.
Also, the bigger the shutteraperture opens, the more pronounced the effect. That numberThe size of the opening is represented by the f-stop. The smaller the number, the biggerwider the iris opensaperture (harder to focus). So f/16 will give you a much sharper overall picture than f/4. Much of the time, f/8 is pretty sharp all around, and if your lens can reach it, f/1.8 will give you good subject isolation with a blurry background. But you’ll need to experiment to see what you like.