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Colour data acquisition for LRGB combination

Acquisition LRGB Deep Sky Reflection Nebula Dark Nebula
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Andre Vilhena avatar
Andre Vilhena avatar
Hello everyone,

I am currently shooting a dark and reflexion nebula from my Bortle 7 location using LRGB filters. I am not very used to LRGB and have some doubts:
 
- Would 2 hours for each filter (binned 2x2) be enough?
- Is it ok to shoot the color when the object is lower in the sky and leave the rest for luminance?

I am shooting one color per day for about 2 hours when the object is between 30º-45º high in the sky and leave the remaining 8-9 hours for luminance. In the end I should have 6 hours RGB (2x2) and 24 hours Luminance - does this approach make any sense?

Thanks in advance.
André
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Sean van Drogen avatar
Sean van Drogen avatar
My approach is as follows aim for ratio 3:1:1:1 of LRGB. I capture 6x 60s L and the 1x 120 RGB each and this loops the entire night, while dithering after each loop. So I would end up with 15hrs lum and 15hrs RGB. When I run this all through NSG script I get the best results

Can’t comment on the binning as have never done it as I don’t understand what the benefit would be.
Dan_Paris avatar
Dan_Paris avatar
Hi,

personnally (and I am also in a Bortle 7 area) I find that shooting 1h for each RGB filter (bin1) is enough, and  I use the remaining time  to gather as much data as  I can for luminance (bin1 also).  How fast is your scope ? Mine is an f/4 newtonian.

If you have a CMOS sensor shooting the chrominance in bin2 is of no real benefit, except some savings in storage and processing time.

Dan
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