Orion Photoshop Images
Place your mouse over the image to see the Orion tracing.
Click the links below to show different base images.
Orion Image 1 - Unprocessed Image
Orion Image 2 - Modified Levels 1
Orion Image 3 - Modified Levels 2
Here is that same view captured at different ISO levels.
Nikon D50, F/3.5, 18mm focal length, 15 second exposure
Wikipedia - Orion (constellation)