So i decided to play about with some numbers and nerd out on the topic of sensitivity and fov..
I landed on some weird ideas, for example two different types of more general quantative sensitivity, which are constant irrespective of your fov. (so are usefull in making decent zoom sensitivities / FOV changes / DPI changes)
http://pastebin.com/m51596b3c
so to get your desired sensitivity value, you take your A/FOV value and multiply by your fov and divide by your DPI.
OR
simply divide A by your DPI
This depends on what you want to have your sensitivity based
around, however i reccomend using the same A/FOV value for any change in FOV (such as zooms, or moving to CS or something)
lolcs
Please highlight any errors/asumptions i may have made, this was just a train of though i went a bit nuts with..
and if you can give me a way of pasting the tables/etc without ruining the formatting, that would be great