m057_127mmf121_20d-nr_240seciso1600_000002_ip-ddp4122-statdiff1515-addbal_5299-6189_0922.jpg
m057_127mmf121_20d-nr_240seciso1600_000002_ip-ddp4122-statdiff1515-addbal+5299-6189+0922.jpg
(m057_127mmf121_20d-nr_240seciso1600_000002_ip-ddp4122-statdiff1515-addbal+5299-6189+0922.jpg)
M57 - Ring Nebula
The file title indicates that his was taken with the Orion 127mm f/ 12.1 Mak/Cas of a friend of mine. I don't believe this is correct due to the wide angle shown. It is more likely that this was an ED80 image with a focal reducer.