The August issue of Astronomy Now is available. The rich, open cluster NGC 6940 is featured in this column where we take a look at basic methods for scanning and inverting your black on white sketches to convert them to white on black positives.
Subject: | NGC 6940 |
Issue: | August 2009 Astronomy Now |
Basic Media: | Charcoal and graphite on artist grade paper. |
Suggested Materials: |
- White artist grade stock
- Charcoal pencil
- HB and 2H graphite pencils
- Artist's chamois
- Blending Stump
- Clipboard and adjustable red light
- Computer
- Scanner or Digital Camera
- Image editing software such as
- Adobe Photoshop
- Adobe Photoshop Elements
- Paintshop Pro
- GIMP - Free!
|

Inverted, Positive Sketch of NGC 6940
Click image to view larger version.

Original Negative Sketch of NGC 6940
Click image to view larger version.