[EddieT (Eddie)]

Thanks heaps Eddie.

You're very welcome!

At least now I understand what it is I'm trying to do and why. You make it sound relatively simple. Now if I can just understand how to get the imaging programs to do what you've suggested I'll be laughing.

Yes indeed. I tried to keep it simple and introductory focusing mainly on the reasons for image calibration (with examples), without specific step-by-step instructions, because these will vary from application-to-applicaton. I think it's better to know what you are trying to acheive and then finding out how to acheive it with your specific spftware.

I love the idea of the flat box. I've tried to do a few off light coloured wall but I've not been able to get the illumination even enough. Great article.

Making a good flat field is paramount. It doesn't take much of an inconsistency to create an inaccurate flat, and applying a bad flat can make your images worse than before. Much worse in fact.

One thing I'd like to see as an adjunct to this article (and I'm not trying to put you back to work Eddie, you've done a fantastic job Anyone who is able and has the knowledge could do this ), is some additions to the "Iceinspace Glossary of Terms" explaining some of the terms you've used, like Normalization, Registration, Optimization, median combining etc. This could also apply to any other article that is posted that uses specialized jargon to explain the topic.

This was constantly in my mind as I wrote the article. But whenever I tried to concisely explain a statement that needed clarification, the article grew in size exponentially I had to draw the line somewhere. In doing that, I decided that certain terms would have to be resourced elsewhere and this article would be the catalyst for that "further research". It was that or end up writing an online book!

I am open to questions regarding any part of the article so if anyone needs help to understand something, please ask. This will also give me a better idea of which parts are unclear and also framework for an addendum if needed, or a future, deeper article.