Table 26. Solar Eclipse Exposure Guide


            ISO            		f/Number 	  

             25      1.4      2      2.8      4      5.6      8      11      16      22
             50      2        2.8    4        5.6    8       11      16      22      32
            100      2.8      4      5.6      8     11       16      22      32      44
            200      4        5.6    8       11     16       22      32      44      64
            400      5.6      8     11       16     22       32      44      64      88
            800      8       11     16       22     32       44      64      88     128
           1600     11       16     22       32     44       64      88     128     176

      Subject             Q					Shutter Speed (s)
-------------------     -----    ------------------------------------------------------------------------
Solar Eclipse
  Partial[1] - 4.0 ND    11         -       -       -    1/4000   1/2000   1/1000   1/500   1/250   1/125
  Partial[1] - 5.0 ND     8      1/4000  1/2000  1/1000  1/500    1/250    1/125    1/60    1/30    1/15
  Baily's Beads[2]       12         -       -       -       -     1/4000   1/2000   1/1000  1/500   1/250
  Chromosphere           11         -       -       -    1/4000   1/2000   1/1000   1/500   1/250   1/125
  Prominences             9         -    1/4000  1/2000  1/1000   1/500    1/250    1/125   1/60    1/30
  Corona - 0.1 Rs         7      1/2000  1/1000  1/500   1/250    1/125    1/60     1/30    1/15    1/8
  Corona - 0.2 Rs[3]      5      1/500   1/250   1/125   1/60     1/30     1/15     1/8     1/4     1/2
  Corona - 0.5 Rs         3      1/125   1/60    1/30    1/15     1/8      1/4      1/2     1       2 
  Corona - 1.0 Rs         1      1/30    1/15    1/8     1/4      1/2      1        2       4       8 
  Corona - 2.0 Rs         0      1/15    1/8     1/4     1/2      1        2        4       8      15    
  Corona - 4.0 Rs        -1      1/8     1/4     1/2     1        2        4        8      15      30    
  Corona - 8.0 Rs        -3      1/2     1       2       4        8       15       30      60     120

Exposure Formula:	t = f^2/ (I X 2^Q)		where:	t = exposure time ()
							f = f/number or focal ratio
							I = ISO film speed
							Q = brightness exponent

Abbreviations:	ND  =  Neutral Density Filter.
		Rs   =  Solar Radii.

Notes:	[1] Exposures for partial phases are also good for annular eclipses.
	[2] Baily's Beads are extremely bright and change rapidly.
	[3] This exposure also recommended for the 'Diamond Ring' effect.

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