Thanks,
Mike - the settings were (about) 26fps in all channels, with my 5x powermate wound back as close to real 5x as I could get it, so maybe 5.5x or something. The Royce mirror is 1.8m focal length so I guess that's something like 10m effective focal length.
I captured 90 seconds in each channel and stacked the best 1000 frames in each channel.
cheers, Bird
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