planetary nebulae
If you want to view planetary nebulae the following link gives images for all the 94 NGC PN and two IC PN.
https://picasaweb.google.com/dunlop1...m95-XF98SCggE#
The field size is always 14 arcmin, with one exception the Helix Nebula NGC 7293. This makes it easy to compare PN sizes.
These PN are north of dec +50: M97, N40, N1501, N6543, N7008, N7076, N7139 and N7354.
They are difficult to see from Australia and NZ.
I compiled these 97 images using
http://www.wikisky.org/