I have always thought that the Ring Nebula looked very pretty. I had not realised just how easy it is to get a photo of it; this is just a 20 second unprocessed image using my 10cm f/5 aperture telescope, at ISO 400 on my Nikon D3100.
A processed photo is below …
This is a stack of 6 images, total 2 minutes exposure (cropped from the original size). The colour saturation is increased somewhat.