Robny Posted October 22, 2020 Share Posted October 22, 2020 Hi All I'm just running a set of darks off at -10 and 180 second, but I've noticed that he occasional one is coming out darker than the rest of them. See below image where the first and third image are darker. Does this pose a problem when creating a master dark, should they be deleted and reshot are is it normal and all is a-ok? Link to comment Share on other sites More sharing options...
andrew s Posted October 22, 2020 Share Posted October 22, 2020 Do they measure differently? They should be the same but for random noise. Regards Andrew Link to comment Share on other sites More sharing options...
Robny Posted October 22, 2020 Author Share Posted October 22, 2020 Please see the attached images, I think they measure different but could be looking at the wrong thing, whats your thought's? Link to comment Share on other sites More sharing options...
andrew s Posted October 22, 2020 Share Posted October 22, 2020 (edited) They look different but without the standard deviation can't be sure. I would try running another set. Ensure no light leaks and I would add a delay between them say 20 s to ensure the chip stabilises between images. Regards Andrew Edited October 22, 2020 by andrew s 2 Link to comment Share on other sites More sharing options...
ollypenrice Posted October 23, 2020 Share Posted October 23, 2020 Atiks usually come with a metal chip window cover. I do my darks off-scope with this cover on because I find excluding all light remarkably difficult. As Andrew says, a delay between subs would be a good idea too. Olly 1 Link to comment Share on other sites More sharing options...
andrew s Posted October 23, 2020 Share Posted October 23, 2020 8 hours ago, ollypenrice said: I do my darks off-scope with this cover on because I find excluding all light remarkably difficult. Olly While I do mine on scope I have a blank "shutter" in the filter wheel and I take them at night in a dark observatory with the roof shut. Regards Andrew 1 Link to comment Share on other sites More sharing options...
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