tooth_dr Posted December 9, 2021 Share Posted December 9, 2021 Coupled with good optics, these new sony-based CMOS cameras are pretty incredible. I am impressed for just 60 minutes of data. I'm trying to gather more and some Ha, so this is just a quick workup of the data. APM LZOS 105/650 RICCARDI 0.75x REDUCER ZWO 2600MC IDAS P2 LPF MESU e200 30 x 120s subs SG PRO / APP / PS CS Adam 36 Link to comment Share on other sites More sharing options...
Sunshine Posted December 9, 2021 Share Posted December 9, 2021 A wonderful Image of Andromeda! 1 Link to comment Share on other sites More sharing options...
Stuart1971 Posted December 9, 2021 Share Posted December 9, 2021 Well something to aim for there….superb…👍🏼 1 Link to comment Share on other sites More sharing options...
tooth_dr Posted December 9, 2021 Author Share Posted December 9, 2021 9 minutes ago, Stuart1971 said: Well something to aim for there….superb…👍🏼 Thanks Stuart, appreciate it. Link to comment Share on other sites More sharing options...
tooth_dr Posted December 9, 2021 Author Share Posted December 9, 2021 20 minutes ago, Sunshine said: A wonderful Image of Andromeda! Thank you! 1 Link to comment Share on other sites More sharing options...
ONIKKINEN Posted December 9, 2021 Share Posted December 9, 2021 Amazing, and just an hour. What sort of sky quality was this shot from? Link to comment Share on other sites More sharing options...
symmetal Posted December 10, 2021 Share Posted December 10, 2021 Great image for just an hour Adam. The noise, while evident isn't the blotchy type which can spoil some cmos images without a longer integration time. The benefit of a 16 bit camera. 😊 Alan Link to comment Share on other sites More sharing options...
tooth_dr Posted December 10, 2021 Author Share Posted December 10, 2021 9 hours ago, ONIKKINEN said: Amazing, and just an hour. What sort of sky quality was this shot from? Thank you, it holds up well even at full resolution. Im in a Bortle 4 according to maps. I live in a rural area, but unfortunately there are a number of LED lights in some houses around 400-800 yards away. I was experimenting with a LPF because typically I image south over the nearby town 5 miles away, and there is a good old bit of sky glow. I also have a clear filter that I intend to also try as a comparison. I think I'll try a few subs on this with the clear filter next. Link to comment Share on other sites More sharing options...
tooth_dr Posted December 10, 2021 Author Share Posted December 10, 2021 8 hours ago, symmetal said: Great image for just an hour Adam. The noise, while evident isn't the blotchy type which can spoil some cmos images without a longer integration time. The benefit of a 16 bit camera. 😊 Alan Thanks Alan. Its definitely got some grain, but I didnt do any noise reduction at all on the image. I'm been using FLATS, DARK FLATS, DARKS and BIAS, and didnt dither. Link to comment Share on other sites More sharing options...
Stuart1971 Posted December 10, 2021 Share Posted December 10, 2021 2 minutes ago, tooth_dr said: Thanks Alan. Its definitely got some grain, but I didnt do any noise reduction at all on the image. I'm been using FLATS, DARK FLATS, DARKS and BIAS, and didnt dither. Can I ask, is there a need for Bias as well as dark flats, as I read with CMOS then Dark flats are the best and only one needed, along with Darks and Flats…? 1 Link to comment Share on other sites More sharing options...
scotty38 Posted December 10, 2021 Share Posted December 10, 2021 Wonderful image! 1 Link to comment Share on other sites More sharing options...
tooth_dr Posted December 10, 2021 Author Share Posted December 10, 2021 28 minutes ago, Stuart1971 said: Can I ask, is there a need for Bias as well as dark flats, as I read with CMOS then Dark flats are the best and only one needed, along with Darks and Flats…? I’m not sure. There is disagreement about it, and I’ve tried various combinations and can’t really see much difference. There are subtle differences I am sure but I can’t physically see them and my processing probably isn’t skilled enough to take advantage of them. It doesn’t seem to be detrimental using bias so I just continue out of habit as I did with my CCD. 1 Link to comment Share on other sites More sharing options...
Laurin Dave Posted December 10, 2021 Share Posted December 10, 2021 Very nice Adam, certainly impressive for an hour, I was similarly impressed by the camera's performance when I took 30 mins of M31 through my GT71... As to the Darks and Bias question... I just measured my Bias it was 500.6 with a MAD of 0.6 my 300 sec Dark was 501.2 with a MAD of 1.0 with the difference being the 'snowstorm' of hot pixels... I'd say matched Darks as they'll best remove the Hot Pixels... dithering though is better still 1 Link to comment Share on other sites More sharing options...
tooth_dr Posted December 10, 2021 Author Share Posted December 10, 2021 Just now, Laurin Dave said: dithering though is better still Cheers Dave. Just need to work out the order. I'm taking 2 minute subs with the OSC, and it is the main system that does plate solving and dithering, and the other scope does 5 minute NB subs. So with dithering at it's current configured, even if I do every fifth sub, I'm going to lose half of my NB subs. Link to comment Share on other sites More sharing options...
Laurin Dave Posted December 10, 2021 Share Posted December 10, 2021 Just now, tooth_dr said: Cheers Dave. Just need to work out the order. I'm taking 2 minute subs with the OSC, and it is the main system that does plate solving and dithering, and the other scope does 5 minute NB subs. So with dithering at it's current configured, even if I do every fifth sub, I'm going to lose half of my NB subs. I'd just experiment with how frequently you dither. My main scope has the CCD so its either 10 or 20 min subs... once I've got 5 or 6 dithers in an integration they combined with cosmetic correction sorts out any remaining hot pixels... So I'd start by just spreading 5 or 6 dithers over however long you're imaging for... So over say 3 hours do them every 15 subs or so... If you ar ein attendance when it dithers or focuses you can always restart the NB sub (or at least you can in SGPro)... Unfortunately my camera needs a window clean... although it doesn't look like the grease issues some have had.. 1 Link to comment Share on other sites More sharing options...
tooth_dr Posted December 10, 2021 Author Share Posted December 10, 2021 36 minutes ago, Laurin Dave said: I'd just experiment with how frequently you dither. My main scope has the CCD so its either 10 or 20 min subs... once I've got 5 or 6 dithers in an integration they combined with cosmetic correction sorts out any remaining hot pixels... So I'd start by just spreading 5 or 6 dithers over however long you're imaging for... So over say 3 hours do them every 15 subs or so... If you ar ein attendance when it dithers or focuses you can always restart the NB sub (or at least you can in SGPro)... Unfortunately my camera needs a window clean... although it doesn't look like the grease issues some have had.. That's a pretty reasonable idea, I'll aim for at least 5 dithers in total. 1 Link to comment Share on other sites More sharing options...
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