+RonC Posted March 23, 2020 Share Posted March 23, 2020 (edited) First image is 10 x 180s and 23 x 240s for 2 hrs of data last night. ISO 800 Canon 1000dm 150PDS NEQ6 guided and dithered + 30 x Flats. Second image is the above added to 3 hours taken earlier this month with the same kit. 35,000,000 LY's away! Comments please... Ron Edited March 23, 2020 by RonC added text Clive, Bassinghamobservatory, BAZ and 1 other 4 Link to comment Share on other sites More sharing options...
Clive Posted March 23, 2020 Share Posted March 23, 2020 Nice images Ron +RonC 1 Link to comment Share on other sites More sharing options...
+Graham Posted March 23, 2020 Share Posted March 23, 2020 Nice Images Ron but way over processed. Background is too black. If you keep the back ground lighter when you process you will get a lot more detail in the Galaxies. +RonC 1 Link to comment Share on other sites More sharing options...
+Graham Posted March 23, 2020 Share Posted March 23, 2020 Ron have a look at Chris's Starry skies over Cranfleet Cut, Sawley. Look at the sky you will see there is not a single black pixel in sight. Link to comment Share on other sites More sharing options...
+RonC Posted March 23, 2020 Author Share Posted March 23, 2020 OK Graham I'll check it out and have another go at it, thanks! 😳 Link to comment Share on other sites More sharing options...
Clive Posted March 23, 2020 Share Posted March 23, 2020 I've no idea how Pixinsight, PS or other software works since I use IRIS. In that, black is 0,0,0. Whenever I create a JPG using it, the black level is always set quite a bit less than zero. Link to comment Share on other sites More sharing options...
+Graham Posted March 23, 2020 Share Posted March 23, 2020 1 minute ago, Clive said: I've no idea how Pixinsight, PS or other software works since I use IRIS. In that, black is 0,0,0. Whenever I create a JPG using it, the black level is always set quite a bit less than zero. Black is always at 0 but the sky colour is way above that point. You can move the lowest signals up away from zero using curves and levels. Link to comment Share on other sites More sharing options...
Clive Posted March 23, 2020 Share Posted March 23, 2020 21 minutes ago, Graham said: Black is always at 0 but the sky colour is way above that point. You can move the lowest signals up away from zero using curves and levels. Possibly unlike other software (?), IRIS is quite happy with negative numbers so setting the black level as a negative number is effectively the same a adding a positive offset. +RonC 1 Link to comment Share on other sites More sharing options...
+RonC Posted March 23, 2020 Author Share Posted March 23, 2020 Right I've re-processed them both as per Grahams remarks, thanks Graham constructive criticism is always welcome. (How would we ever learn??) and the bid one.. Comments please? Ron +Graham and +Ibbo 2 Link to comment Share on other sites More sharing options...
+Graham Posted March 23, 2020 Share Posted March 23, 2020 Thats more like it Ron. The first one is brilliant. Loads more detail in the galaxies and they are bigger as well. +RonC 1 Link to comment Share on other sites More sharing options...
+Graham Posted March 23, 2020 Share Posted March 23, 2020 2 hours ago, Clive said: Possibly unlike other software (?), IRIS is quite happy with negative numbers so setting the black level as a negative number is effectively the same a adding a positive offset. Thats interesting. With the likes of PS and pixinsight 0 is in the bottom corner of the window so you cannot go to a negative position. Link to comment Share on other sites More sharing options...
Clive Posted March 23, 2020 Share Posted March 23, 2020 25 minutes ago, Graham said: Thats interesting. With the likes of PS and pixinsight 0 is in the bottom corner of the window so you cannot go to a negative position. I didn't mean the X - Y position, 0,0 is the bottom left hand corner and you can't go negative. I was referring to the RGB intensty levels which in IRIS can be between -32768 and +32767 (rather than than 0 to +65535). +RonC and +bryand 1 1 Link to comment Share on other sites More sharing options...
+Graham Posted March 24, 2020 Share Posted March 24, 2020 I did have a look at Iris last night. Looks far more complicated than Ps to use but I guess it boils down to what you are use to. +RonC 1 Link to comment Share on other sites More sharing options...
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