Hi Guys,
In case anyone is interested, I have added a tutorial on my web site on the use of the Digital Development Filter or DDP filter as it is otherwise known. This is the filter that I use most often and it is a fairly easy one to use. The tutorial can be found at the following address.
http://www.rkastro.net/digital_development_filter.html
I hope that people will find it useful and shall be pleased to receive feedback on the tutorial. Other peoples experiences are always useful.
Clear skies,
Richard