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Do we have any Nebulosity users here?

I am using Nebulosity 3 to stack astro images from my Pentax K-r. JPGs work okay but I want to try DNGs for higher quality results. When I preview my DNG files in Nebulosity they display in B&W, which is to be expected because they haven't been domosaiced for the Bayer matrix yet.

When I add a demosaicing step to my workflow, Nebulosity doesn't recognize my camera version so I get a popup window asking for manual demosaic settings. I tested different settings but get a color cast (or worse) in my results. Anyone ever get demosaicing to work well on the K-r or any other Pentax camera? What settings did you use?

(similar queries on the Nebulosity support group suggests that there are zero Pentax users active over there)

I'm currently using IRIS so can't help. Sorry.

Cannot help either. Pentax cameras are so good for astrophotography and it really is a shame that Pentax RAW files are such step childs when it comes to these types of application software. I guess we just have to keep on posting images until it is realized that we are also here!

I use DSS instead of Nebulosity. Choosing the proper matrix is key - I believe that the chips all are RGGB. You will probably get a color cast and those are usually fixable in post.

Problem solved last night. The default settings (Array Type = RGB, x and y pixel size = 1, x and y offset = 0) work okay as long as I do an Auto Color Balance immediately after. I was foolishly trying to do my raw testing with real astrophotos. It was difficult to judge colors. Loading a daylight photo with some strong colors made it much easier to see what Nebulosity was doing.

I see that DSS and IRIS were mentioned above. DSS was my original software before upgrading to Nebulosity. I like DSS but Nebulosity offers more fine control, especially on the post-processing end with contrast curves and noise reduction. I've never tried IRIS but it has a rich feature set that might complement Nebulosity for some subjects.

Despite having IRIS on my laptop for the past 6 yeras, I have only just started to use it. Even though the price is right (free), it is not an easy program to learn. I don't find it particularly friendly. Despite that, in one afternoon, I produced the best version of a Comet McNaught image than I have in 5 years of struggling with PSE6 and the Carboni Actions I have installed. I have used DSS to stack but have always had a problem trying to get the colour back. I'm hoping IRIS will do a better job for me. In fact, taking the time to learn the basics of IRIS has got me all inspired again. I'm currently converting an EQ mount purely to astro and hope to have it finished in time for the spring gales. Summer is coming and the Magellanic Clouds will be easily accessable soon. I do like the fact that IRIS can correct for distortion and am looking forward to doing some stacking and mosiacs.