This is not quite deep-sky, but might be "landscape".
This is a composite image of the 2012 Perseid Meteor shower taken with a Canon 1DX and a rented Canon 8-15mm f/4.0L lens. The underlying background is a single image. I captured meteors throughout the night and picked the brightest ones to copy onto the background image. LightRoom and Photoshop CC were used to make the composite.
Thanks for looking,
Love this picture, congrats.