I'll give several examples quickly: Useful suggestions welcome in the comments! Due to the autofocus capability of the Nikon D5000 kit 18-50, I used it to take and receive images of my models on a regular basis. (the most important thing is to slowly rotate the focus ring clockwise while simultaneously increasing the shutter speed by -5 stops and discarding (4)) wide enough open so there are no octagons in the picture, Watch out! When the subject is up close and the background is far away, proper blur is impossible since the background will begin to double in bokeh. (in bright sunlight, trying to photograph an object perched on a tiny bridge set against a background of a relatively distant, mottled yellow and green fall forest is not going to turn out well). In addition to controlling the quality of the light and the distance between the subject and the background, you can also purchase THIS GLASS for $4,000! If you have a 60 W bulb and no windows in a room that's 20 feet by 20 feet, you can shoot images without using a flash thanks to aperture.