Working on improvements...

 I just found this thread on f295, with lots of feedback on the app.

I noted
-1/3 step ISO,
- apertures up to 1024
- extra reciprocity curves for multigrade RC IV paper (However, I disagree with the values given 15 minutes leads to 84 minutes corrected - I keep firmly on the fact that below 30 min, there is almost no reciprocity for MG RC IV - I will nevertheless include that curve)

I am also working on the following :
-  combos: storing presets;
- a real way of managing /adding/removing reciprocity curves.

So
- next minor updates may have extra ISO and apertures + reciprocity curve on the web sites
- next major : combo
- later : management of reciprocity curves