Last night I saw the very faint PN NGC 7094 (mag 13.4, size 1.6') with a 16" GSO Dob.
It was visible with a 21mm EP and a UHC filter but not with a 9mm EP and no filter. The PN is 1deg 47m east of the GC M15.
Lewis Swift discovered it in 1884 with a 16" refractor from the Warner Observatory in NY.
He described it as a star [mag 13.6] in an eeF nebulae, very difficult.
http://en.wikipedia.org/wiki/Warner_Observatory
This image is from wikisky.org.
https://picasaweb.google.com/1100488...71453471860146