The seeing wasn't great this evening but I decided to gather some O-III data for NGC 7000, that I could use to generate a bi-colour image. I shot 12x10 minute subs. Having processed the O-III image, the results weren't great but it was something to work with.
Towards the end of the imaging session I noticed that the dew controller had switched off and the optics had consequently fogged up. This obviously did not help!