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Hi Stefan & all, I then adjusted the blackpoint (in pretty coarse manner). [...] This means that a simple adjustment of the blackpoint distorts the signal ratios across the image massively. I never considered an adjustment of blackpoint non documentary. Is it? Good catch. I think, basically you’re r...

Second - how is preservation of relative emission strengths impacted by using substantially increased exposure times for Oiii vs Ha? This is obviously not an issue for OSC-duoband, but it's pretty common practice in mono imaging. Apart from different integration times it gets even more complicated ...

Hi Andrew, I would guess, that this is caused by atmospheric refraction: https://en.wikipedia.org/wiki/Atmospheric_refraction This star seems to be nicely round, so this is most probably no problem which is caused by stacking. Another possibility is chromatic aberration of your optics (if glass / le...

Probably not the most artistically compelling composition, with the 3 main subjects spread around the edges of the image, but I never did well in art class anyway. :lol: Indeed there seems to be some kind of a triangle visible in the nebula structures. And I wouldn't have thought that Gamma-Cygnus ...

Hi, I guess Ivo just forgot to change back to English after his last test runs. You can simply change this in the config file back to English:


Hope that helps!

Best regards, Dietmar.

BTW: Dutch is a great language and quite close to English. Give it a try!

For adjusting contrast or exporting to JPEG, you might find an online free JPEG compressor tool useful. Hi & thanks for pointing out. Yes that might be the easiest solution for people who haven't polluted their whole system(s) with tons of useless software of all kind - like me. ;-) I often use dar...

Tilt is hit or miss for me. I guess it's the focuser. The OTA is really budget. Optics are fine but there are some parts that aren't really robust like the spider vane or the focuser. I tried to adjust for tilt via the focuser's screws and seemed to nail it for some images. But then you image a dif...

dx_ron wrote: ↑Thu Sep 05, 2024 9:14 pm I'm sure you'll have that 16-panel mosaic of the full Loop ready soon (right?).

Sure, Ron - excellent idea! A quick estimation and calculation based on the clear nights over the past 12 month ... wait ... yes ... I guess this will be StarTools release 47. Roughly.

You are producing images faster than I'm able to write comments on them :lol: :confusion-shrug: One more excellent shot! But I don't see 'a couple of stars'? What do you mean ;-) This ocean full of marbles glowing in all colours ... ? :thumbsup: BTW: The quality of your data is _much_ better then mi...

Thank you Stefan. :) Yes, this time most things worked as desired ;-) Any reason for collecting duo NB data with two different sub exposure lengths? I get the different ISO settings with the DSLR, they are the same as the ones I used for broadband and duo NB. But combining different exposure times i...