And you are quite right, Gordon! I jumped to minutes, from seconds... Something like that usually happens when I nitpick at someone else's typo!
How about 5 and 24 uRad for limiting sizes? Dave On Tue, 15 Feb 2000, Gordon Uber wrote: > Dave, > > You are quite correct: 17.45 mrad = 1 deg, not 1 arc minute. > > However 4.848 microrad = 1 arc second, or approximately 5 microrad. > > You may be thinking of 1 arc mjnute = 0.2909 mrad > > Gordon > > > At 02:13 PM 2/15/00 -0800, Dave Bell wrote: > >Whups! You meant a *degree* is ~17 mRadian, didn't you? An arcsec is very > >close to 0.3 mR or 300 uR... > > > >Still, 0.3 mR for a fine feature, or 1.5 mR for a character are still > >pretty convenient units for visual acuity. And the Tan function becomes > >trivial in that regime... > > > >Dave
