Thanks
Deano - I think I have the camera gain % right but I will recheck this.
Alex - Yes, good point. I have my 150mm Mak f13 guiding scope focal reduced to about 1200 but I can put in spacers to decrease this to about 820mm before I run out of focuser travel. I will also try the guiding camera on my 80mm f6 refractor, which I usually use for imaging, to see the effect of the wider fov.
Cheers Peter
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