Here is a 3-D view of Greg’s “3” asterism which can be found in the constellation Leo. You can view the stereograph by:

1. Using the Cross-Eyed method.
2. Using 3D prism glasses (berezin.com/3d/3dprism.htm)
3. Using Brian May’s OWL Stereoscope (londonstereo.com)

I took the image of the asterism using the Sky90 refractors and the M26C OSC CCDs on the MiniWASP array at the New Forest Observatory. Dr. Brian May created the stereograph from my Deep-Sky image.