Digital Photography School, in the middle of many a good photo tutorial, is publishing explanations on how to make a photo with nice circular star trails like on the image on the right.
- Choose the right location (a good sky view, with proper decor)
- Choose a low ISO setting (for long exposures)
- Shoot multiple images
- Stack the images together using a special software (Photoshop should allow it too)
Not too difficult. This must be quite feasible.
Do you have an example to show?