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Equipment Discussions >> Electronically Assisted Astronomy

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Moromete
professor emeritus


Reged: 02/15/12

Loc: Romania
Re: Three DSOs around Draco new [Re: Puck Ja]
      #6052650 - 08/29/13 02:12 PM Attachment (6 downloads)

Quote:

Are you using any filter on the M33? There is some green cast on the whole frame.

Another trick that nytecam showed me is to use the "Color Overloading Smoothing" to get rid of the small blue dots in your M33 image. It takes about 10~16 passes (clicks, < 1s for 1 pass) depending on how much you stretch the histogram or lower you white level.
And it works great!




The green color cast is a software processing error. I have used no filter.

I'll try the "Color Overloading Smoothing". Thanks for sharing!

Below is a single 180s unguided M33.


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Moromete
professor emeritus


Reged: 02/15/12

Loc: Romania
Re: Three DSOs around Draco new [Re: Moromete]
      #6052656 - 08/29/13 02:16 PM

I forgot to say that M33 images were taken with a ST80 at F3.5.

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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Three DSOs around Draco [Re: Moromete]
      #6052772 - 08/29/13 03:11 PM

Quote:

Quote:

Are you using any filter on the M33? There is some green cast on the whole frame. Another trick that nytecam showed me is to use the "Color Overloading Smoothing" to get rid of the small blue dots in your M33 image. It takes about 10~16 passes (clicks, < 1s for 1 pass) depending on how much you stretch the histogram or lower you white level. And it works great!


The green color cast is a software processing error. I have used no filter. I'll try the "Color Overloading Smoothing". Thanks for sharing! Below is a single 180s unguided M33.


Colour balance via the SX Lodestar s/ware is very sensitive but pretty accurate if not abused! After colour synthasis, the three RGB sliders must be be moved by identical amounts otherwise a strong colour bias results. Colour saturation [depth of colour] is a separate option.

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