Tsk, tsk, tsk. Pie are not squared, pie are round. Cornbread are squared.
Len (in America's outback) --- > -----Original Message----- > From: Doug Franklin [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, November 26, 2002 8:01 AM > To: [EMAIL PROTECTED] > Subject: RE: Aperture values (was: Why I won't be buying an MZ-S) > > > On Tue, 26 Nov 2002 17:34:25 +1000, John Coyle wrote: > > > Picky, Doug! > > You are right, of course, John. It's just that if you try to > go from f/1.0 to the upper reaches of f/64 and above, using > 1.4 instead of the square root of two, you get "off" from the > standard f-stop values and it can be confusing. > > I've also found that explaining it as diameters-versus-areas > makes it easier for a lot of people to understand. Most > people I've explained it to remember "pi are squared" (no > cornbread are square, pi are round) ... uh ... A=pi*r**2 and > relating it to the area and diameter of the lens iris helps > make it clearer for them. > > TTYL, DougF KG4LMZ > > >
