Advice post-processing in Nebulosity 4

[chouet]

Hi

I’m struggling to get started in Nebulosity 4. I’ve followed the tutorials carefully but am struggling to reveal any Nebulosity in my images with ‘Levels / power stretch’ (again, following the tutorials carefully and using low power, etc). The images I’m trying to process are around 30 x 480 sec subs of the Rosette Nebula and 40 x 120 sec subs of the Pleiades. Both using an FLT110 refractor at F7 and an unmodded Canon 5D3 (I captured RAW + JPEG).

In both sets of subs, I can see nebulosity in the raw subs but it disappears after stacking and power stretching doesn’t reveal anything. If I stack the JPEGs, the nebulosity is there. While capturing, the histogram peaks were around 30-40% for each colour channel. I have plenty of darks, bias, flats, etc.

Any ideas to get me started?

Thanks!

Nick

[chouet]

Forgot to mention - I was also using a LP filter.

[teoria_del_big_bang]

I found this guys tutorial very helpful, maybe you have already seen it though.

Nebulosity Tutorial

Surely if you can see some nebulosity in the JPEGs then it you stack the raw data lights on their own you should see some nebulosity when  debayered and stretched.

Steve

 

[teoria_del_big_bang]

I made this Word document that covers one method of pre-processing and stacking raw data subs with lights, darks and flats if it helps. It does not cover the stretching of the final processed image though. It may be of some help ? 

Steve

Nebulosity - Pre Processing & Stacking.docx

[Starlight 1]

I still have the program on my computer, I give up AP a year ago .  The program never worked  that well , and thinking it was made from the same man  that started  PHD.

[AKB]

I used to use Nebulosity all the time for processing, and I still use it for data acquisition.

If you post a raw stack we could perhaps take a look and try it ourselves.

 

[dannybgoode]

I have found Nebulosity very easy to get to grips with and has produced some pleasing results from my poor attempts at data capture  

As an all in one image acquisition/ processing tool I think it’s very good. Agree with AKB - it you can upload your subs somewhere I’m happy to have a play. 

[DavM]

Maybe you could try CURVES>>KELLER Ha STRETCH in Nebulosity 4

Dave