Uranium235 Posted July 17, 2018 Share Posted July 17, 2018 49 minutes ago, Anthonyexmouth said: using a canon 760d. didnt think there was much trailing in the raw image, posted a raw in a previous post, have a look and let me know. i do know its not focused very well . Might be worth taking a look at the sensor charts then, so you can work out what might be the best ISO for you. https://www.sensorgen.info/ Dont worry about star colour at the moment (something which a high ISO will wipe out). Edit: just noticed the camera isnt listed on sensorgen, so you might need to do a bit of google pestering to see if anyone has performed tests on the sensor. Link to comment Share on other sites More sharing options...
Stub Mandrel Posted July 17, 2018 Share Posted July 17, 2018 If all your raw subs look like the example you posted, this is definitly a wrong setting somewhere in DSS. Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted July 17, 2018 Author Share Posted July 17, 2018 2 minutes ago, Stub Mandrel said: If all your raw subs look like the example you posted, this is definitly a wrong setting somewhere in DSS. yeah, all like that . 21 of them. like i said, focus aint the greatest but its quite hard with that little mak 90 and the silly focus knob Link to comment Share on other sites More sharing options...
Atreta Posted July 17, 2018 Share Posted July 17, 2018 3 hours ago, happy-kat said: 1 there is a rogue sub in the mix with bad trails My thoughts too. It would be a good thing to check each frame to see if there is any trailing. But i guess it is mostly due to out of focus stars. The threshold having to be so low to find enough stars is an indication of it. Link to comment Share on other sites More sharing options...
bobro Posted July 17, 2018 Share Posted July 17, 2018 It does look as though alignment is using hot pixels - the 2 hot pixels taken as examples in the stacked image and single sub are in the same place: Link to comment Share on other sites More sharing options...
Stub Mandrel Posted July 18, 2018 Share Posted July 18, 2018 9 hours ago, bobro said: It does look as though alignment is using hot pixels - the 2 hot pixels taken as examples in the stacked image and single sub are in the same place: Well spotted Bobro, obviously they are scoring higher than the 'doughnut' stars The cure will be to use the cosmetic function: Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted July 18, 2018 Author Share Posted July 18, 2018 Just tried, that didn't work. Will give up on this set and try again when the clouds are gone Link to comment Share on other sites More sharing options...
dph1nm Posted July 19, 2018 Share Posted July 19, 2018 Using the superpixel debayering mode in DSS might fix the problem (which is almost certainly due to the stars being out of focus). Nigel M Link to comment Share on other sites More sharing options...
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