Hyperfocal distance calculator

You, I mean that is beyond hot.

I know this is going to come across as very geeky, but calculating hyperfocal distance in your head isn't particularly hard - for wide angle lenses anyway.

f = focal length in mm
a = aperture number (e.g. for f/8, a=8. for f/11, a=11)

if your value for the circle of confusion is the commonly used 0.02, use n=50. if it's 0.016 (so-called Zeiss value, as recommended by Thom Hogan), use n=60 which is close enough.

hyperfocal distance in mm is ~ [f*f/a]*n

I use n=50 to make the math easy, and then nudge the result up some.

So if f=12mm, aperture is f/11, the hyperfocal distance is roughly 0.65m.