Thanks Paul, I'm just curious as to how one determines where a number like 4.76 is. This is the number I get with the 1.7x on a 2.8 lens. Is it the amount of light one would get at F/4 divided by 1.7, which puts it nearer 5.6. Or is it closer to 1/2 stop? You're right, it has no real practical purpose. In real life I do just like you, partial clicks, EC, etc. I have one of those inquiring (annoying) minds that likes to know these silly things. ;-)
Don > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Tuesday, May 24, 2005 8:55 AM > To: [email protected] > Subject: Re: F stop question > > > With older cameras that have manual aperture control, I just turn > the dial and position it between the two spots. You can even do > that in thirds with enough accuracy for any practical > application. With my *istD cameras and my LX I use exposure > compensation to split stops. Calculating numerical values doesn't > seem to serve any real purpose. > Paul > > > > How does one figure partial stop numbers? > > For instance what stop is half way between 4 and 5.6? > > And where does 4.76 fall? This is a 2.8 lens with the > > SMCP-F 1.7x converter. > > I'm guessing there is a simple multiplier for this but > > with my limited knowledge of math I have no clue > > what it is. > > This is more out of curiosity than necessity. > > Someone posted a link to this info but I can't find > > it again. > > > > TIA > > Don > > >
