HD 209458b
All of the following are raw (unprocessed) I-band images of HD 209458, a bright star with a planet.
HD 209458 is the star near the center of the images. The planet itself is much too faint and close to the star to be detected
(lost in the star's glare). The other objects in the image are stars that happen to lie in the same direction as HD 209458.
Because HD 209458 is so bright (~7.5 mag), the telescope was purposely put out of focus.
This keeps the CCD from saturating; otherwise even a very short exposure is too bright for the sensitive equipment.
This is why the stars look a bit like donuts.

Images taken in 2001 October 13.
On the left is the way it looks on the sky. On the right is the way astronomers prefer to look at the data. CCD image in black and white
CCD image in reverse

A false-color image to highlight faint features.
CCD image pseudo color

An image taken in 2002 April 14, under much better seeing conditions. The image is physically smaller than those above. At this time, HD209458's planet was in front of the star (mid-transit). However, with a depth of only a percent or so, you can't possibly see the effect in an image like this.
CCD image from 2002 April 14 CCD image
Same as the image on the left, but in false color.