> Someone - one of our Bobs - posted a chart of 1/3, 1/2 and full
stops
> a month or so ago. I printed it out, but now I've lost it. Would
you
> or someone who saved it mind posting it again? I have no idea
what
> thread it was in.
Ken
It was I ... and I never got an answer to "why f22 not f23?" ...
despite the fact that it was the norm early on in the century ...
If you want to format best, load copy table intp Excel then "convert
text to columns" using comma delimiter.
Stops, Whole, +1/3, +1/2, +2/3
0, 1.00, 1.12, 1.19, 1.26
1, 1.41, 1.59, 1.68, 1.78
2, 2.00, 2.24, 2.38, 2.52
3, 2.83, 3.17, 3.36, 3.56
4, 4.00, 4.49, 4.76, 5.04
5,: 5.66, 6.35, 6.73, 7.13
6, 8.00, 8.98, 9.51, 10.08
7, 11.31, 12.70, 13.45, 14.25
8, 16.00, 17.96, 19.03, 20.16
9, 22.63, 25.40, 26.91, 28.51
10, 32.00, 35.92, 38.05, 40.32
11, 45.25, 50.80, 53.82, 57.02
12, 64.00, 71.84, 76.11, 80.63
13, 90.51, 101.59, 107.63, 114.04
To generate table for yourself:
In Excel's notation (substitute cell reference for names or, like I
do, define nales for the appropriate columns and have readable
formulae ;o)
Aperture = 2^(Stops/2)
Stops = 2*Log(Aperture,2)
Where "Stops" are relative to f1
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
