The area of Orion has some of the most stunning displays of nebulosity seen in the sky. The most famous of these is the Great Nebula in Orion's sword. On a clear night out in the dark country side, this grouping of stars looks a bit fuzzy to the unaided eye. With binoculars, the fact this is a nebula is clear. With a medium telescope, you can even see color and this is unique for a nebula since all others are to dim to activate the color receptors in the eye.
What is hard on this nebula photographically, is there is also very faint nebulosity in the area equally as detailed and pretty as the bright center core which is home to the Trapezium. The trapezium is a small grouping of 4 stars that are just resolved in the full resolution of this image and are at the brightest part of the nebula. The outer wings, however, are 1,000's of times dimmer making a simple image difficult to take.
To process this, it is best to take different exposures, stack them together and then use unsharp masking techniques to bring out the details throughout the image.