Search found 35 matches

by dx_ron
Tue Jul 26, 2022 8:13 pm
Forum: Gallery
Topic: M27 RC6 / OSC
Replies: 5
Views: 266

Re: M27 RC6 / OSC

Been flipping them back and forth on my monitor. I like the nebula better 'less blue', and the stars better 'more blue'. Maybe I will go back again to try to make both happen - clouds until at least Sunday here.
by dx_ron
Tue Jul 26, 2022 12:37 am
Forum: Gallery
Topic: M27 RC6 / OSC
Replies: 5
Views: 266

Re: M27 RC6 / OSC

Had time to go back and re-process the data to make a less-blue version. The idea for using Siril's photometric weights was just to get a starting point, though when I set the values in ST I thought "that's pretty, I'll keep that". The Siril weights, by the way, were R=0.583, G=0.411, B=1 so that wa...
by dx_ron
Mon Jul 25, 2022 2:12 pm
Forum: Gallery
Topic: M39 - 1st light for RisingCam IMX571C, minimal processing
Replies: 6
Views: 212

Re: M39 - 1st light for RisingCam IMX571C, minimal processing

I would expect binning to increase SNR regardless of where it comes in relation to other processing steps, but I obviously do not know if "bin-late" vs "bin-first" affects tracking's view of the noise term for any pixel. Is there any reason to always postpone deconvolution until after contrast & sha...
by dx_ron
Sun Jul 24, 2022 12:05 am
Forum: Gallery
Topic: M39 - 1st light for RisingCam IMX571C, minimal processing
Replies: 6
Views: 212

Re: M39 - 1st light for RisingCam IMX571C, minimal processing

So far so good. It seems to stress the resources available with the RPi, as I've had a couple of software crashes. There's a feature involved with displaying each image that I can turn off in Ekos, but I an Intel based mini-C is in the future even if I stick with linux. I am quite pleased that most ...
by dx_ron
Sat Jul 23, 2022 8:15 pm
Forum: Gallery
Topic: M39 - 1st light for RisingCam IMX571C, minimal processing
Replies: 6
Views: 212

M39 - 1st light for RisingCam IMX571C, minimal processing

2 hours, AT65EDQ 60s subs at gain 100 (Low-Conversion Gain) Stacked in Siril There weren't too many suitable widefield, broadband targets at darkness. The goal was to try different exposure times on stars, so I went with a field that is stars, more stars and only stars. I settled on 60s exposure as ...
by dx_ron
Tue Jul 12, 2022 11:57 pm
Forum: Gallery
Topic: M27 RC6 / OSC
Replies: 5
Views: 266

M27 RC6 / OSC

M27_265x_38pctbin_Siril-color-weights_512k.jpg 4.5 hours (265x60s) from my suburban backyard with the RC6 reduced to 993mm and QHY183C After playing around with the colors a while, I went back to Siril (where I stacked) and ran the linear image through photometric color correction and then converte...
by dx_ron
Tue Jul 12, 2022 12:47 am
Forum: General Discussion
Topic: "Double duo-band"
Replies: 13
Views: 610

Re: "Double duo-band"

Hi Stefan, At least the IDAS douband is not cheap. (I do have the NB-1). For this purpose, I'd suggest the NB-1 & NB-3, but not pairing it with the Antlia ALP-T, which has a thickness of 2mmm vs. the 2.5mm Of the IDAS filters. You'd be way off focus and correction. Another problem with the NB-2& NB...
by dx_ron
Sat Jul 09, 2022 11:12 pm
Forum: General Discussion
Topic: "Double duo-band"
Replies: 13
Views: 610

Re: "Double duo-band"

Thanks for the very detailed description. Quite the dance - but it should still all not amount to much time compared to how much time is invested in collecting the data. I haven't found the passband specs for the NB3 filter. The likeliest way to match the Oiii passbands and response would be to pair...
by dx_ron
Sat Jul 09, 2022 3:46 pm
Forum: General Discussion
Topic: "Double duo-band"
Replies: 13
Views: 610

"Double duo-band"

A CN poster made a nice SHO image using an OSC camera and two different duo-band filters: https://www.cloudynights.com/topic/830949-north-america-nebula/?p=12000143 The first filter is a normal Ha/Oiii. The second is Hutech's IDAS NB3 ( https://www.sciencecenter.net/hutech/idas/nb-filters/index-nb3....
by dx_ron
Sat Jul 09, 2022 3:16 pm
Forum: Image Processing Troubleshooting
Topic: Stacking & alignment
Replies: 4
Views: 485

Re: Stacking & alignment

In Siril you would register your first channel and stack as normal. For a subsequent channel you would make a sequence that has, as its first image, either the stacked output from the first channel or the same individual first-channel sub that was the original reference frame. When you stack the lat...