​​Despite my affinity for the narrowband Bicolour Palette, I thought it would be a nice idea to complete the set of Astrodon narrowband filters with this one - the Sulphur-II 3nm​ filter. Astrodon also make a Nitrogen-II 3nm filter, of course, but the wavelength is so close to Hydrogen-Alpha, that I have not observed enough of a difference in images to push me to want it. Besides, now having the Sulphur-II filter as well allows me to produce images with the Hubble Palette if I like. 

Two new PixInsight processing tutorials have been ​added. The first one is on producing an HDR image and the second one is on enhancing broadband LRGB data with narrowband data such as that from Hydrogen-Alpha and Oxygen-III. 

​A new PixInsight processing tutorial has now been added. This is a remake of an old one, based on using narrowband data to produce Bicolour Palette images, mainly centered around Hydrogen-Alpha and Oxygen-III data. The tutorial also covers how to generally use the PixelMath process to blend data from more narrowband images, such as Sulphur-II, Hydrogen-Beta and Nitrogen-II. 

​The tutorial on Preparing a Mosaic in PixInsight has now been updated to include a new section. This new section goes through an alternative method to prepare one's individual mosaic segment images, using a generated fake stars image. The image is generated by the CatalogStarGenerator script and is aided by the ImageSolver and AnnotateImage scripts, which are also covered as a result. 

The first tutorial in a long line of tutorials to come has now been published. This is a post-processing example tutorial, which goes through the entire PixInsight workflow from a pre-processed image all the way to the end result. Though the tutorial is self-contained, the reader would find it useful to read more into the various procedures within the tutorial (to this end, there are a number of other tutorials linked in the introduction). 

Another new PixInsight process tutorial is now up on Light Vortex Astronomy. This one aims to instruct the reader on how to produce a seamless mosaic out of several images with an overlap between them. The procedure makes use of StarAlignment to produce a rough mosaic used to register all the individual images, followed by GradientMergeMosaic to produce a seamless end result. Also discussed is how to make best use of the settings provided to minimise seams and remove problematic stars that appear pinched at the edges. A PixelMath technique to remove pinched stars is also discussed. To read the tutorial, follow this link to it. 

Another new PixInsight processing tutorial has just been written. This one is a little lighter than usual as it covers a simple procedure for preparing your images for publication, whether online or for printing. The tutorial goes through changing the colour profile with ICCProfileTransformation, resizing the image and adjusting its resolution with Resample, adding a border with Crop, annotating labels with Annotation and saving in appropriate image formats. If you would like to read this tutorial, follow this link to it. 

Two new PixInsight processing tutorials have now been written. The first one, Stretching Linear Images to Non-linear covers another basic function of PixInsight. This is a fundamental step in any post-processing workflow done to astrophotographs, as it brings out the contrast in images to bring our work to light. The second one, Touching Up Colour in Images, covers performing saturation enhancements to selected colours or overall, as well as performing hue shifts.