Scopes: 190mm SW Mak-Newt @ f/5.3 & 90mm SV Raptor Triplet @ f/7 Cameras: Atik 383L+ mono w/ EFW2 FW with Astrodon filters & Canon XSi 450D (Baader mod) Mount: Astro-Physics Mach1GTO mount guided with QHY5 KWIQ guider Software: Sequence Generator Pro; PixInsight; Photoshop CS5 Best investment: Stone Garden Observatory - Bortle 4 (Green)
Clear skies http://www.starkeeper.it http://stelledelcielo.blogspot.com/
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My images: http://mtanous.wordpress.com
Warren - Stargazing since the 60's! Scopes: ETX-LS6, ED80T, AT6RC, Lunt LS60T, C9.25 Mounts: Atlas EQ-G, Vixen Portamount II Cameras: Atik 314L+,DMK31AU03,SSAG, ASI120MC Filters: Astrodon LRGB, Orion HA, SII, OIII Acc: Orion 5 place Filter wheels x 2, Flatman Primary Imaging site: Bortle Scale Class 6 Red Zone http://astrobin.com/users/rigel123/
Quote:Hi Jose,Thanks very much !I've used for the main picture LRGB = HA / SII / OIII / OIIIBut if you use this, in most cases you get those salmon colorlike in classic HA-L-R-G-B images, cause the SII - channelis as weak as the red channel (at the classic HALRGB) in comparison with the strong HA-Data.So to get better color results (nearly deep red), I use a second combination, a classicRGB = HA / SII / OIII (so red is the strong HA-channel)I use this one only to get a better "red" into the image. For the OIII-Part I use:RGB = SII / OIII / OIIISo the weaker SII channel gives a better result in the "natural-look" combination, because OIII is normally the weakest.I use Photoshop Layer Technics and turn it to "color". Then use the percentage sliderto control the intensity (for red the HA/SII/OIII and for Blue the SII/OIII/OIII)And I use two different kind of basic material. The main is the material, I described above.The other, to push the nebula is the Tonemapped versions, but made similar to the aboveimages, but only without stars and more stretched.Those starless ones, I use only max. up to 25% but in most cases 15-20%, if my aim is to get a natural look. Hope this helps a bit. But, every Object has his own rules and the described technic is not cooking recipe. You have to take a look at the intensity of the channels you got and then to to find a way, to get the right colors btw. what you want to show.RegardsImmo