I am building an exposure calcutator and am just about complete, but I have a question about how I should round off the f/stops. I know that each f/stop has about twice the surface area of the previous one, The formula I am using to derive the f/stop gives the value squared (which makes sense for area). So this is my table with f/stops below:
2 4 8 16 32 64 128 256 512 1024
1.4 2 2.8 4 5.6 8 11 16 22 32
The above numbers are about as accurate as you can get for f/stop values. What I am wondering is where do I split between two f/stops? If I get a number of 24, rounding would normally round up to 32 (f/5.6), but I don't know if this applies to this doubling system. Should I create half stops that would suggest using either one?
I hope this makes sense to someone.