Analyse stars with dualband filter. Correct nebula colors?

@mabula

I have the same problem using L-eNhance tri band filter with OSC Asi533 camera.

I tried 4 different settings in initial setting 0 RAW/FITS  tool and do all processes...

but when i do 9) TOOLS - CSC the image looks yellowish and it's impossible to calibrate correctly as i normally do with for example L-Pro filter.

Any help?

Thanks

I guess it's because these are narrowband composites and not actual RGB data? I don't think you get accurate color calibration on that type of data with the tool.

Posted by: @vincent-mod

I guess it's because these are narrowband composites and not actual RGB data? I don't think you get accurate color calibration on that type of data with the tool.

Yes, L-eNhance, as Idas NB1 or Triad or other quad band filter, are narrowband multi band composite filters.

So do you mean that with 1.077 APP version - tool 9 Color star calibration now it is not possible to obtain a good star color calibration with this type of filters?? 

Well, my understanding is this only works well with broadband data to begin with. See also here;

Hi,

I have only recently tried working with Ha / OIII narrowband data so my knowledge is not exhaustive.

However for what it is worth:

a)  My understanding is the same as Vincent's that in particular the Adaptive Black Body calibration methods do depend on having Broadband data to work correctly.

b)  I found that star colours in my HOO combines looked more natural using the HOO 2 preset option and when in CSC the Adaptive Black Body tools worked rather similarly to a broadband image calibration.  In CSC with an image combined using HOO 1 preset the stars were widely (randomly) scattered across the  chart space and seemingly impossible to calibrate using the sliders

c)  I have not tried it myself thus far but does the Balance RGB calibration option in CSC help at all?

Interested to hear how you get on.

Mike