(Click to enlarge)
This is the first color image I've taken with this 135mm SLR lens I got on Ebay. I had to clean up some bloating on the bright stars but overall I was really pleased with the color correction of this lens. To improve the resolution somewhat I used drizzle to combine the frames. You can resolve many of the stars in the open cluster M11 at the center of the large field of stars and dark nebulae.
There is also a higher resolution version of this image.