Youngest left this behind having upgraded to a more advanced model. When she asked for a bit of help on some exponential graphing and regression formulas, I grabbed it off the shelf full of optimism that help was at hand. Hours and hours and hours later after jabbing at keys and getting error messages I had to admit defeat. However, I do not take defeat easily. So, a few hours more and I finally coerced the devil to give me an answer. It was one I came up with by hand at the beginning. Basically a simple problem (I think?) which I still do not quite understand...I was not cut out to be a math tutor.
This is an amazing shot April. What did you have in the background to give you that amazing bokeh? I'm the same, maths certainly is not my strong point lol Good on you for trying though :-)
Love the DoF and bokeh. If you are into programming languages then the new(ish) Wolfram language might be useful (particularly for creating charts). http://www.youtube.com/watch?v=_P9HqHVPeik
You have taken a fairly mundane object, given it a new perspective and made an interesting shot. Love the background. Your maths is better than mine because I was lost at exponential graphing!