Two articles have been posted in the past few days. The last part of
the curves series and an article titled "Digital Graduated Neutral
Density Filter" have been posted on my web at:

http://ronbigelow.com/articles/curves-5/curves-5.htm

http://ronbigelow.com/articles/neutral-density/neutral-density.htm

Other articles can be found at:

http://ronbigelow.com/articles/articles.htm

Ron Bigelow
http://ronbigelow.com

Hello Ron
I don't often post but have to say how much I value your input.  Thank you.
Regards
Ono.