Astronomy and DSLR Astrophotography Blog

This is an interesting distortion that makes a photograph look as if you were looking through a long tube, like a straw. It is due to the fact that the circle from the end of the telescope tube can be seen surrounding the celestial image.

You can deal with vignetting in two different ways.

1. One is with a bright object. You can try to use the zoom feature to enlarge the object to the point where the circle is out of the view range of the camera. This will not work so well with a faint object as the magnification makes it even dimmer.

2. For those celestial object that are faint, you can try to remove the “vignetting” as part of the processing of the photographs on the editing software you use. With some perseverance and practice it can be done by learning how to adjust the sky levels, keeping uniformly dark background sky, yet getting rid of the circle.

Related posts:

1. The Seven Points To Remember About Astrophotography
2. Deep Space Objects
3. Astrophotography Cameras Summary
4. Cassegrain Telescopes
5. For The Backyard Hobbyist and Budding Astrophotographer

astrophotography Vignetting