Quote Originally Posted by Ed Sukach
The math is actually correct, ... BUT ...

The "size" of the "hole" (aperture) must be considered in terms of hole area,
Right on!! "exponential" is the word I couldn't think of before coffee this morning

Maybe though, when Nige and Elangs finish up calc'ing for the 0.01" needle size, they'd share the exposure time with us?

regards