Ooops! We just were alerted by an alert APUG member of a bug in our free BTZS Calculator. It has been updated to build 3 and can be downloaded for free to registered users.
Thanx for the feedback so far!
Ooops! We just were alerted by an alert APUG member of a bug in our free BTZS Calculator. It has been updated to build 3 and can be downloaded for free to registered users.
Thanx for the feedback so far!
Does this one have the 31 step entry potential?Originally Posted by MJSfoto1956
Sandy King
Michael,
I'm curious where you found the algorithm to do the calculation. I've looked and never been able find it.
I had nearly a dozen emails back and forth with Phil Davis. At first he was reluctant to explain things in detail as I'm sure his assumption was (given the kinds of questions I was asking) that I was just another "editor".
However, with persistence, I finally got him to explain things "under the hood". Turns out that part of his magic is that he uses "lookup tables" to assist with calculating the EFS when the paper has higher than 1.05 dynamic range (meaning that a subset of the calculations are based on anecdotal observation, not just algorithmic, which is the only thing in the end I still question the need for).
The math is relatively "easy" but I will continue to improve the calculator over time -- especially with your feedback.
How about one that works on a Mac?
Thanks Michael,
From your response, I take it, the formula isn't in the public domain; which I understand. I was thinking of this more from a programming standpoint, since I'm a senior Windows programmer - I'm not a B&W photographer (I shoot 98% Velvia), so I wasn't interesting in actually using it.
Yikes! It works fine on my Mac! (but of course, I happen to own MS Excel and clearly many do not). I'll have to investigate if there are any freeware MS Excel readers for the Mac and get back with you. There might even be a way to "convert" it so that it works with AppleWorks (but then you would need to own that application as well)
Thanx for reminding me of not forgetting my Mac heritage!
Patience Sandy, patience!
There is NeoOffice for the MAC, which my wife uses to handle MS Excel files. I haven't yet tried the calculator, but will make an effort over the weekend.
another option would be OpenOffice, if I'm not mistaken there is a build for OSX.... in fact there is here http://porting.openoffice.org/mac/download/index.html
or one of the derivatives: Neo Office http://neooffice.org/
I have been using OO since it came out and quite honestly won't be upgrading any office apps I have.
erie
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