NGC 891
NGC 891 is an "edge-on" galaxy thought to be similar to our own Milky Way.  It is about 30 million light-years from earth. This was a 2.2-hour exposure from my Los Angeles backyard with a 9.25-inch telescope at f/7.
file: NGC891-240sX20P3Cel925f7ASI533L-Pro9242023b2a2d.jpg

Photographic Data
telescope:
Celestron EdgeHD 9.25-inch SCT at f/7

mount:
ZWO AM5 harmonic mount

guiding hardware:
SVBony 60 mm f/4 guidescope (fl=240 mm)
Guide Camera: ZWO ASI1662MC

imaging camera:
ZWO ASI533MC-Pro co;or camera at 14-degrees F through an Optolong L-Pro light pollution filter

exposures:
240 seconds X 20 (153-minutes or 2.5 hours)

processing:
Stacked in Asiair Plus and cropped and post-processed in Adobe Photoshop Elements

photographic site:
West Los Angeles
http://mstecker.com/pages/chhouses_fp.htm
(Bortle 9 light polluted sky)