Have only viewed all the above processing attempts on my phone so far, can't wait to flick through them om the laptop and compare.A histogram is a graphical representation of measurable data. I will certainly take a look at those plugins and books too! That is interesting about the horizontal banding! I am indeed using a Canon(EOS1200d). Thanks for the processing and detailed steps, much appreciated! Once you understand how actions work you can easily make your own though I have to confess I still find still Photoshop a bit of a dark art, despite using it for many years. As an engineer I prefer PixInsight because I am more comfortable with numbers and maths, horses-for-courses.
#Backyardeos changed histogram now images dark full version#
Noels Tools contains a nice horizontal and vertical de-banding action and several other useful tools such as light pollution gradient removal, star colour boost and background noise reduction amongst others.Īction set plug-ins don't offer anything you can't do yourself, it just speeds up the process, and they won't run on many of the versions of Photoshop essentials, you have to have a full version of Photoshop to install and run actions so if you intend to buy them make sure your version of Photoshop is compatible. If you intend to stay with Photoshop and are using the full photoshop program then have a look at adding a set of action plug-ins specifically developed for astrophotography such as Noel Carboni's Astronomy Tools Action Set, or Annies Astro Actions. The image has some horizontal banding, typical of some Canon Cameras. I like the way that you have kept the background noise under control in your image and this has allowed you to pull the galaxy above background and just give a hint at the colour in the galaxy. Focus is good for the galaxy, there is some coma around the image edges. If you are not using a coma corrector this is normal, if you are using a coma corrector check that the spacing to the camera sensor is correct and that there is no tilt in the optical path. In Photoshop you use layers for that and selective reveal, in PixInsight we use masks. When you comment that you are struggling to get rid of the greyish tinge to the image, for the background that is a good position to be in, the trick is to stretch the galaxy while trying to keep the background neutral. There are not too many comments to add. Flats will help with your post processing, leaving you less to try and correct for afterwards, especially since you are using Photoshop where correcting for vignetting is quite time consuming.įor the number of exposures you took there is a surprising amount of useable data captured but there is only so far you can go before the inherent noise in the data becomes apparent, for this target with your equipment three hours of data would be a good starting point and that would allow you to stretch the data much harder while leaving the noise behind. Reduce Exposure and Gamma across all channels. or even have a quick go at processing it that would be amazing.Īttached below is a quick process in PixInsight and Photoshop, I have pulled the galaxy as hard as possible, probably a little too far.ĭynamic Background Extraction, correction by division. If anyone could give some advice on processing M51, what processing steps they normally take etc. To me the image looks very well focussed and I like the framing - personally I like to see these targets surrounded by the vastness of space and not totally filling the frame. Have to say you've done better than I ever did with a dslr. I followed that up with some very careful use of the dodge and sponge tool and a final noise smoothing using Dfine.Ī lot more data would help pull out the details in M51 and some flats would help reduce the background gradients. I then saved them into Photoshop and used a layers to pull the colour from the arcsinh stretch into the histogram stretch image. I then cloned the image and performed a HistogramTransform stretch on one of them and an Arcsinhstretch on the other. I then created a mask so I could try to reduce the noise in the background using MultiLayerTransform process. I cropped the outer edges a little before applying DynamicBackgroundExtraction twice - once in subtraction and once in division. Well I have had a quick go at processing your image.
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