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__________________________
Solar Eclipses
Partial* - 4.0 ND 11 - - - 1/4000 1/2000 1/1000 1/500 1/250 1/125
Partial* - 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** 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*** 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 sec 2 sec
Corona - 1.0 Rs 1 1/30 1/15 1/8 1/4 1/2 1 sec 2 sec 4 sec 8 sec
Corona - 2.0 Rs 0 1/15 1/8 1/4 1/2 1 sec 2 sec 4 sec 8 sec 15 sec
Corona - 4.0 Rs -1 1/8 1/4 1/2 1 sec 2 sec 4 sec 8 sec 15 sec 30 sec
Corona - 8.0 Rs -3 1/2 1 sec 2 sec 4 sec 8 sec 15 sec 30 sec 1 min 2 min
Exposure Formula: t = f**2 / (I X 2**Q) where: t = exposure time (sec)
f = focal ratio
I = ISO film speed
Q = brightness exponent
Abbreviations: ND = Neutral Density Filter.
Rs = Solar Radii.
Notes: * Exposures for partial phases are also good for annular eclipses.
** Baily's Beads are extremely bright and change rapidly.
*** This exposure is also recommended for the 'Diamond Ring' effect.
F. Espenak - Nov 1992