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Weird red pixels
I keep on getting these weirdly shaped pixels when trying to do widefield. While I don't yet understand 100% the whole stacking darks process, I have tried this and it doesn't process out these pixels. They are always red. In fact for most of my images the - for lack of a better term - noise is often mostly red.
I discarded the astro widefield images where I was getting this but I have attached a scaled down copy of an original image from some ISO testing I was doing tonight - what else is there to do when it's raining - as well as a zoomed in snip of the original.
The camera is a Pentax K20D. Often, when I get this issue, I am using my Pentax 17-70 SDM lens or a Tamron SP AF Di 90mm Macro. While I don't usually get such pronounced red pixels when using my SW ED80 Pro/WO ZenithStar 66 the red noise issue usually shows up. In all cases we are talking exposure times of ~5-30 seconds.
Hopefully I have included enough information?
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