O-III filter. Much less detail compared to UHC. Central star is much less visible.
sketches : Nebulae : NGC 40 planetary nebula 11-22-2003 |
Back |
NGC 40 planetary nebula 11-22-2003 |
NGC 246 planetary nebula 11-22-2003 |
NGC 40 planetary nebula 11-22-2003 |
NGC 246 planetary nebula 11-22-2003 |
Copyright © 2003-2007 Michael Portuesi. See the front page for licensing information.